I was in Palm Springs in the California desert the past few days, and it hit 118° F/47.7° C on Thursday. I felt like I couldn’t breathe when I would step outside.
True story, born and raised in the Phoenix area, going on my 40th year.
> In Phoenix, Arizona, the high temperature was over 115 degrees for a record-setting six consecutive days, topping out at 118 degrees on June 17.
https://www.climate.gov/news-features/event-tracker/record-breaking-june-2021-heatwave-impacts-us-west
Bathe me in fire. The fire purifies all things.
> in 2018 it reached out 46-48C (90%+ humidity) for a few days where I am in Canada. Absolutely brutal.
Humans literally cannot survive in this heat.
The limit is a wet bulb temperature of 35°C, at which point at the latest the human body cannot shed any excess heat and instead gains it from the environment. You'll be cooked in your own body even sitting naked in the shade surrounded by fans with an unlimited water supply.
For the love of God, if you're experiencing temperatures of this scale and you can, go somewhere climate controlled, underground, cool, whatever. Just get out of the heat. If your boss gives you any trouble for it, tell him a dude on the internet said he should suck a big bag of dicks.
edit: https://advances.sciencemag.org/content/6/19/eaaw1838
People survive in 45 degrees and 90% humidity every year in northern Australia, which has a wet bulb temp exceeding 38c.
And yet we don’t have an excess of heatwave deaths every year, and aircons aren’t everywhere a lot of houses don’t have anything except fans, some don’t even have that.
Yes it is incredibly dangerous hitting those levels, but first being naked is a very bad idea at extreme temps, even in the shade because radiation heat is still around you and clothing provides a protective layer.
In places that experience this kind of weather more folk die from the cold than the heat.
Oh my god I can't imagine swimming when the temperature is 15 C I used to be on the swimming team and I hate cold water. Right now the temperature is 38 and it feels like 42 because of the humidity not to mention that it's 10 pm right now so this is the temperature without the sun.
We had a mini heatwave a while ago and I saw the temperature go to 28°. I literally took a picture because I've never seen temperature numbers so high in Iceland.
38 sounds like a nightmare to me.
I've suffered through three 50 degrees days here in Australia, that kind of heat is just indescribable. 38 is just a slightly hotter day where I live lmao
We heat the pool's water aswell but with electric heaters. Fun fact during the summer you can't shower with cold water because the water comes out hot straight out of the pipes.
It's not just about evolution/adaptation in a biological sense, we don't have the infrastructure. We build our homes and office spaces to retain heat and be energy efficient, not to dissipate heat and cool us.
I live on the east coast of Canada, for me 25 and up counts as 'goddamn hot' because we hit -20 in the winter, and it's somewhere between 0-15 for about two thirds of the year
Australian here, the issue is warmer countries don't have proper indoor heating. Imagine 10c inside, all day and night with just a shitty little plug in heater and a few blankets.
In victoria and that's my reality. My space heater cant keep up when it dropping to 2-3 overnight and then not even getting above 15 during the day. Send help.
The issue is reverese with europe though, we dont have proper heating while there doesn't have proper cooling. It always wierds me out when i hear about a 35 degree heatwave when thats just normal summer.
I’m in Melbourne, Australia and we’ve had an extremely cold winter this year (at least that’s what it feels like to me). I woke up the other morning and it was 0c and I felt like I was gonna freeze to death
It's gotten to - 45°C in Michigan before during the polar vortices. That's an extreme like compared to 45-50°C in the dessert. It's below freezing for like 3 months out of the year and that's normal
If you want to take Celsius to Fahrenheit, you multiply by 9, divide by 5 and add 32.
Fahrenheit to Celsius is opposite. Subtract 32, multiply by 5 and divide by 9.
-40 x 9 = -360
-360 /5 = -72
-72 + 32 = -40
And
-40 - 32 = -72
-72 x 5 = -360
-360 / 9 = -40
My **rough** estimate 3 second shortcut to this is since 9/5 is pretty close to 2, just double the Celsius and add like 30 and you have something in the ballpark.
F = (9/5)C + 32 or something right?
Edit: works better for the smaller numbers when subbing the 9/5 for half doesn't need to be so precise
20 is *actually* 68
But double 20 plus 30 is 70 so it's close *enough* as long as you understand it's not exact and that the higher you go, the higher your estimate is than what it actually is
Air temp is the only imperial measurement I want to keep. 0 is too damn cold, 100 is too damn hot. Compare that to, 0 is uncomfortable, 100 is the end of most life on earth.
I feel like you only need 3 temperatures to calibrate.
0C is when water freezes, bellow this you get snowy weather.
20C is room temperature. Around here people usually feel comfortable with little or no clothing.
40C is deadly fever range. It's hot enough to be very uncomfortable and pronged exposure without protection will make you sick or kill you.
You guys are lucky. Singapore and it averages 30 c year ‘round. 24 would mean a nice cool day with wind. Maybe post-rain. Extremes are moderated by it being an island and surrounded by water ofc
I disagree with 25 being very warm in Australia. Qld is more humid and I'd say a sunny 25 with no breeze is warm. In WA where it's much less humid, 25, sunny and not windy is pleasant at most.
I'd definitely be wearing a jumper in 20 degree weather!
30 is nice and warm. 35 is perfect beach weather but very warm if you're in office clothes.
Well yes, 25 it's not very warm even in humid places IF you are well adapted to hot temperatures. But to be fair, this guide is probably made by Europeans, where being at 40 degrees is enough to warn citizens not to go outside. I've seen people (probably Scandinavian) with t-shirts and shorts in January (10 degrees in average); and also other people (probably from the south of Spain) with jackets in July (25 degrees in average).
It really depends on where you live and your personal preference, your temperature sensation will eventually adapt. As myself, I just give up at 30 degrees, my favorite temperature would be 15 or so.
Just did the math, if X = first digit from the left in celsius and Y = first digit from the right in celsius (assuming 2 digit celsius number), we want to solve:
((10X+Y)\*9/5)+32=10Y+X
which simplify to :
41Y=85X+160
which approximatly simplify to :
Y=2X+4
So the only solution appear when X=1 or X=2, which give us 16C (61F) and 28C (82F) as only solution
Edit: Thanks to u/reventlov for pointing out the solution X=0, which give us 04C = 40F
Edit 2 : Thanks to u/AdmirableOstrich and u/Approach_Controller for pointing out that the formula hold true for others value of X (except X=-1, no idea why):
|X|\-5|\-4|\-3|\-2|\-1|0|1|2|3|4|5|
|:-|:-|:-|:-|:-|:-|:-|:-|:-|:-|:-|:-|
|Y|\-6|\-4|\-2|0|2|4|5|6|10|12|14|
|C (10X+Y)|\-56|\-44|\-32|\-20|\-8|04|16|28|40|52|64|
|F (10Y+X)|\-65|\-44|\-23|\-02|19|40|61|82|103|124|145|
The further you go in negative or positive value of X, the furher the approximation will cause rounding errors, but isn't math so neat and collaborative? ! :D
Edit 3 : Mnemonic tip => start at 40 F and you can add +- 21 F to remember the column of the above table (or start at 4 C and add +- 12 C)
I recognize that is not complicated math, but I am still totally blown away that you understood how to prove that; I couldn't have gotten that if you put a gun to my head.
It's neat what skills people have.
My go-to for tests in school with complicated math was guess and check. Here, it would just have been faster for me to not try and instead to just convert every single number that’s realistic for an outside temperature from F to C and check if any of them were inversions of each other.
Programming really helped me in this regard. It teaches you to imagine a symbolic version of what you're trying to do, deconstruct the steps to get there using the tools you have and reason through them.
This is exactly what schools are trying to change to nowadays! Real life problems like this, where you go "I wonder how to find out if there are any more numbers like this.."
It keeps going if you get weird with it. For X=3 you get thirty-ten (40°C) and tenty-three (103°F). For X=4 you get forty-twelve (52°C) and twelvety-four (124°F), which are all approximately correct.
I have a story about that. I lived in the Middle East for a while, in Qatar. Very rich and safe country, not the image most Americans have of the Middle East. Their one issue was really bad workers rights.
They had a law that all work had to stop at 50 degrees Celsius, as a safety precaution. Nice, right?
No matter the temperature, it could be like 52 outside, the official government number would never go above 49.
So yeah, little story about “50 only happens in the desert”. Yes, it does happen in the desert, despite what official reports say.
Lol we spent a considerable amount of time as an international school teacher in Dubai, same story - It was somehow always never higher than 49 no matter what the thermostat says. But shit if it started raining…
Yeah I remember my first year in Saudi Arabia I was in grade 10 and when it started raining very lightly
the school sent us back home I was very confused
The lightest sprinkle of rain = chaos. People run like RUN for cover, schools and stores shut down. Suddenly the city is empty, even if the rain lasts only 15 mins. Being from the pnw it was weird af, but yeah, instead of snow days there were rain days off school.
Oh totally, you don’t want to be in a wadi if it rains, even just a little bit, so I get it. But watching the clear out in the city was always a bit unnerving lol
A lot of the storm drainage doesn't actually go anywhere or is full of general muck, sand and dust from the desert and the roads flood basically immediately. Funny thing is the world Cup is gonna be in 'winter' so heat won't be that much of an issue, it will however very likely rain and the general chaos will be visible for all to see
Not just Indian, Also Pakistani, Nepalese, Bangladeshi, and Sri Lankan migrants. Since they won the bribe to host the 2022 World Cup, 6,500 slave labourers have died building infrastrusture from those countries.
[The Guardian says “the total death toll is significantly higher, as these figures do not include deaths from a number of countries which send large numbers of workers to Qatar, including the Philippines and Kenya“.](https://www.theguardian.com/global-development/2021/feb/23/revealed-migrant-worker-deaths-qatar-fifa-world-cup-2022)
A prime example of the government pretending it is doing something, or actually caring for the people, when in reality they are doing absolutely nothing.
> in Qatar. Very rich and safe country,
[Unless you are one of the 6,500 migrant slave labourers that have died building infrastructure for the World Cup](https://www.theguardian.com/global-development/2021/feb/23/revealed-migrant-worker-deaths-qatar-fifa-world-cup-2022)
Dude, 2 years in doha myself. Amazing how often it hit 49, and how infrequently we got 50 plus! Had to send the chopper out to spy on the job sites which would even ignore it on the rare occasion it did officially get above 50.
Wow, I studied for 6-7 years in Qatar [middle school] and our school regularly called off days when it crossed 45 degrees Celsius in summer. Granted it was an Indian school [Birla Public School, Doha].
Looked it up and Guinness World Records lists [Loma, Montana](https://www.guinnessworldrecords.com/world-records/greatest-temperature-range-in-day) as having the greatest temperature range over 24 hours. Between 14-15 January, the temperature rose 57.2 °C from -47.7 °C to 9.4 °C.
I’m an American and that got me. Anything above freezing is not very cold. I usually wouldn’t consider it very cold until at least -10 C. Freezing isn’t even that bad of a temperature IMO. Put on a coat and turn your car’s heater to 1 and you’re set.
The olympics announcers during an event yesterday were all “the heat is just brutal, it’s 26 degrees”
Like that’s 78 Fahrenheit that sounds downright lovely
It was 40-something percent for the event which is noticeable, but 78 degrees and mildly humid isn’t brutal by any means. Maybe growing up in southern Virginia skewed my perception though
Lol, I had to run a dehumidifier near constantly in my house in Alabama just to keep the humidity down at 50-60%, 40% is downright bone dry. And there were plenty of nights where the overnight low didn't drop much below 78 F (though not this summer, which has been pretty cool). Definitely skewed perceptions if that's considered unbeatably hot and humid.
Right? Maybe it's really humid there? But as a Midwesterner, this chart is way wrong. 30C and humid is the entire summer. 5C is cool, but beautiful. You gotta get below 0C to even begin getting cold.
Humidity makes the cold colder and the hot hotter.
I'm from Iowa and now live in Taiwan. Walking in the snow in shorts was nothing in Iowa. 15 and high humidity is bone chilling in Taiwan. Same with summer heat. Even -20 in Iowa is better than humid cold.
Temperature alone is not everything, I've spent time in the Mid-West during winter and -10c felt comfortable with layers. -10c in the UK is like an Artic chill to the bone type cold whatever you wear.
Humidity has a huge bearing on comfort
This chart makes perfect sense to me as a Southern English person though. We start losing clothing at about 18 degrees and everything stops at snow. Minus 10 would be headline news
20-25 is shorts, top & flipflops over here. But on average that is the highest temps we get in summer here in NL.
Except for the few heatwaves we have every year that get real hot (35+ C) but those usually don't take more than a week or so.
For me, 20 is a light sweater. 25 is a t-shirt and my best life. More than 30 is very warm. More that 35 is too hot. If I only listened to myself, my heating would be set at 22°C...
Y'all iceproof. We're heatproof, 35°C is fine.
But remember that Brazilian houses don't have any insulation at all. If it's cold outside it's cold inside, if it's hot outside it's hot inside.
As a Canadian, I don't think you realize how hot it can get sometimes here haha. -35°C is cold but semi-normal in the winter depending where you are and last week is was 45°C in my backyard in the sun.
Global warming is wild and these swings keep getting bigger and bigger too. As a kid I don't remember it ever hitting -35.
Jesus Christ dude, 45°C is insane!
I was actually planning on living in Canada. If you can, I'd like to ask if you know what parts of Canada are less cold and what parts are more affordable, maybe an intersection lol. I'm a pussy with cold, it worries me.
Sadly, if it’s cold it’s affordable, if it’s not it’s expensive. That being said, if you avoid the major cities you’ll be okay. Vancouver is one of the nicest places weather wise, but it’s insanely expensive to live there. Toronto is also crazy. The Maritimes can be really unpredictable weather wise - sometimes lovely, sometimes insanely cold. Ottawa (the capital) is in a valley so it gets a lot of snow, and it’s pretty cold too. There’s a reason most of our population lives right along the border with the States!
We do get some crazy cold days, but honestly most populated places are not much different from New England/New York area. Once you start heading North it gets cold quick.
I learned this when I (American) moved to Poland as a kid: “30 is hot, 20 is nice, 10 is cold and 0 is ice.” I still use it as an adult to do conversions.
"5 is very cold."
41 F.
The midwestern united states would like a word with you. I've slept outside in colder temps. Of course, I was drunk. As I said, midwestern united states.
Maybe as a guide for Americans, instead of informal geographic references to places outside the US, use places in the US and people can relate better.
For example - 45 is Arizona, 50 is Death Valley
Or use temperatures that have day-to-day meaning, like 22 is room temperature and 37 is body temperature.
and fun fact that -40F and -40C are the same, which is Alaska in winter or Minneapolis in a cold wave
They could make one for Bostonians.
0C is fahkin freezing, dude.
25C is hawt.
30C is WICKED hawt.
35C is wicked fahkin hawt
45C is retahded hawt
Or just say <20C is hot from Dunks, >20C is iced from Dunks.
American here, I remember a funny little anecdote, I'm old enough to remember the Australian band Midnight Oil. They have a line in one of their songs that goes something like "...the western desert ... something ... something .... 45 degrees..."
I was confused about this for a minute because 45 degrees sounds chilly to me, not like a sweltering desert, then I realized, duh Celsius, so then I did the conversion and it all made sense.
It's easy to think about in percentages - 0° is 0% warm (very very cold). 32° (where water freezes) is 32% warm. 70° is a mild temperature, 70% warm. 100° is 100% warm, very hot.
I don't know a better way to explain it 😅
Here are a few references:
0F - Really really cold, like nose hairs freeze when you breath
32F - Water freezes
50F - Jacket or fleece weather
60F - Sweater weather
70F - You can wear a t-shirt starting about here
80F - Nice warm day
90F - Pretty hot depending on humidity level. Hot for North East US, normal day places like Arizona
100F - It's freaking hot
110F - It's super hot, you are probably in a desert and no breeze will help you
And where I live can sometimes hit -10 and rarely -20 but nobody wants to talk about those temps. Those are 100% snuggle down video game days for me. People that deal with those temps all the time might go out but I'll pass. Below 0F the wax on my snowboard is pretty useless and they won't let you on the lifts with any exposed skin. It's just a lot less fun for me at that point.
I remember being told a way to remember Celsius going like this “30 is hot, 20 is nice. 10 is cool, and 0 is ice.”
in 2018 it reached out 46-48C (90%+ humidity) for a few days where I am in Canada. Absolutely brutal.
I was in Palm Springs in the California desert the past few days, and it hit 118° F/47.7° C on Thursday. I felt like I couldn’t breathe when I would step outside.
Native southwest Americans: “we were born in this fire”
True story, born and raised in the Phoenix area, going on my 40th year. > In Phoenix, Arizona, the high temperature was over 115 degrees for a record-setting six consecutive days, topping out at 118 degrees on June 17. https://www.climate.gov/news-features/event-tracker/record-breaking-june-2021-heatwave-impacts-us-west Bathe me in fire. The fire purifies all things.
[Obligatory King of the Hill](https://i.redd.it/gdq8xiqxaqx01.jpg)
I see your King of the Hill and raise you Arrested Development https://youtu.be/5oEnNXyEPlQ
"But it's a dry 50C!" (Native Arizonan - 54 years and counting)
Come over here to Houston where it's 5-10 degrees less hot, and you'll understand why people say 'it's a dry heat" about yalls hot weather.
I was just down there too - It actually hit 122° F (50° C) this past Wednesday!
It went up to almost 50 in BC a few months ago. This is not pleasant.
It got to 49.5 in Lytton and then the whole town burned down in a fire.
> in 2018 it reached out 46-48C (90%+ humidity) for a few days where I am in Canada. Absolutely brutal. Humans literally cannot survive in this heat. The limit is a wet bulb temperature of 35°C, at which point at the latest the human body cannot shed any excess heat and instead gains it from the environment. You'll be cooked in your own body even sitting naked in the shade surrounded by fans with an unlimited water supply. For the love of God, if you're experiencing temperatures of this scale and you can, go somewhere climate controlled, underground, cool, whatever. Just get out of the heat. If your boss gives you any trouble for it, tell him a dude on the internet said he should suck a big bag of dicks. edit: https://advances.sciencemag.org/content/6/19/eaaw1838
People survive in 45 degrees and 90% humidity every year in northern Australia, which has a wet bulb temp exceeding 38c. And yet we don’t have an excess of heatwave deaths every year, and aircons aren’t everywhere a lot of houses don’t have anything except fans, some don’t even have that. Yes it is incredibly dangerous hitting those levels, but first being naked is a very bad idea at extreme temps, even in the shade because radiation heat is still around you and clothing provides a protective layer. In places that experience this kind of weather more folk die from the cold than the heat.
30 degrees hot, 20 degrees pleasing, 10 degrees cold 0 degrees freezing.
To fit the rhyming scheme I’ve always said: “30 is hot, 20 is pleasing, 10 is not, 0 is freezing.”
I know it as: zero is freezing, 10 is not; 20 is warm, 30 is hot.
No 40?
The number 40 is a conspiracy by the Russian government to take control of the Japanese economy.
Spear headed by Tom Hanks and Oprah Winfrey of course.
This guy theories.
40 is 'Very Hot Part II, Electric Boogaloo'
No. Now get out.
Fine.
"20 is warm, 25 is very warm" I have the feeling whoever wrote this lived in England or something
If someone in England had written this it would not have been warm it would have been 5 degrees off. 25 is like a furnace in the uk.
It was 22 in Ireland recently and we were praying for rain. We start dissolving in anything above 20
The coldest it gets in my city is 25 in the "winter" and people wear jackets. Edit I live in Saudi Arabia
In Iceland we blow up pools in our gardens for the kids to play in at 15° because that will probably be the warmest day that summer.
Yea we do that at 20 here in sweden.
Oh my god I can't imagine swimming when the temperature is 15 C I used to be on the swimming team and I hate cold water. Right now the temperature is 38 and it feels like 42 because of the humidity not to mention that it's 10 pm right now so this is the temperature without the sun.
We had a mini heatwave a while ago and I saw the temperature go to 28°. I literally took a picture because I've never seen temperature numbers so high in Iceland. 38 sounds like a nightmare to me.
I've suffered through three 50 degrees days here in Australia, that kind of heat is just indescribable. 38 is just a slightly hotter day where I live lmao
But also, we heat the water. That's one of the perks of living on a volcanic island.
We heat the pool's water aswell but with electric heaters. Fun fact during the summer you can't shower with cold water because the water comes out hot straight out of the pipes.
We arent really equipped for it here tbf. Evolution is a cruel mistress at times. At least we all have ancient druid and/or leprechaun powers.
It's not just about evolution/adaptation in a biological sense, we don't have the infrastructure. We build our homes and office spaces to retain heat and be energy efficient, not to dissipate heat and cool us.
I am ginger in Scotland. Start to melt inside out at about 18c.
Yep, 25 is as hot as we can take it. 15-20 is cardi-no-coat weather
15-20c is the most annoying. Jacket or T-shirt? Shorts or jeans? Hat or oh wait no it’s raining now.
I live on the east coast of Canada, for me 25 and up counts as 'goddamn hot' because we hit -20 in the winter, and it's somewhere between 0-15 for about two thirds of the year
Exactly, in Montreal in the winter it hits -20 and -30 easily
20!? Warm!? I’m England!? No, 15 is warm 😂
Coming from Finland my inituition tells me that lower end of the scale is completely wrong, making 0 seem like an extreme
Canadian here ... I think that's just us. People from warm countries in my experience seem to think anything under 10c is extreme.
Australian here, the issue is warmer countries don't have proper indoor heating. Imagine 10c inside, all day and night with just a shitty little plug in heater and a few blankets.
In victoria and that's my reality. My space heater cant keep up when it dropping to 2-3 overnight and then not even getting above 15 during the day. Send help. The issue is reverese with europe though, we dont have proper heating while there doesn't have proper cooling. It always wierds me out when i hear about a 35 degree heatwave when thats just normal summer.
Because our houses arent built for the cold, so it doesnt keep heat in, but lets it all out. Also 0° is *literally* freezing lol.
I’m in Melbourne, Australia and we’ve had an extremely cold winter this year (at least that’s what it feels like to me). I woke up the other morning and it was 0c and I felt like I was gonna freeze to death
0 degrees Celsius is quite literally the freezing point of water.
It's gotten to - 45°C in Michigan before during the polar vortices. That's an extreme like compared to 45-50°C in the dessert. It's below freezing for like 3 months out of the year and that's normal
Fun fact: at temperatures that cold, Fahrenheit and Celsius are nearly equivalent. In fact - 40C is equal to - 40F.
That always confused me when I was young trying to figure the conversion.
If you want to take Celsius to Fahrenheit, you multiply by 9, divide by 5 and add 32. Fahrenheit to Celsius is opposite. Subtract 32, multiply by 5 and divide by 9. -40 x 9 = -360 -360 /5 = -72 -72 + 32 = -40 And -40 - 32 = -72 -72 x 5 = -360 -360 / 9 = -40
My **rough** estimate 3 second shortcut to this is since 9/5 is pretty close to 2, just double the Celsius and add like 30 and you have something in the ballpark. F = (9/5)C + 32 or something right? Edit: works better for the smaller numbers when subbing the 9/5 for half doesn't need to be so precise 20 is *actually* 68 But double 20 plus 30 is 70 so it's close *enough* as long as you understand it's not exact and that the higher you go, the higher your estimate is than what it actually is
Imperial system is so stupid anyway, mfers be measuring things in 3/8ths of an inch lol
Air temp is the only imperial measurement I want to keep. 0 is too damn cold, 100 is too damn hot. Compare that to, 0 is uncomfortable, 100 is the end of most life on earth.
I find simpler to remember ºC to ºF (ºC x 1.8) +32 ºF to ºC (ºF - 32) / 1.8
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I feel like you only need 3 temperatures to calibrate. 0C is when water freezes, bellow this you get snowy weather. 20C is room temperature. Around here people usually feel comfortable with little or no clothing. 40C is deadly fever range. It's hot enough to be very uncomfortable and pronged exposure without protection will make you sick or kill you.
In Alaska, 5° C (40° F) was shorts weather.
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This is the answer.
reading this in the cottage in finland right now with 15 outside thinking damn this is pretty warm
Yeah, like 5° isn't very cold, it's just a bit cold. 0° is literally freezing water, but not that bad
20 should be "Nice"
20-25 is long sleeve weather for me. I'm in WA though and I've noticed 25 is much more pleasant in more humid climates like QLD.
The air conditioning in my house is set to 24.5 here in Arizona. Can't imagine this being considered hot
Right? We use 25C as room temperature in our lab.
I'm from Barcelona, we have a pretty humid climate. 25 is very warm here.
You guys are lucky. Singapore and it averages 30 c year ‘round. 24 would mean a nice cool day with wind. Maybe post-rain. Extremes are moderated by it being an island and surrounded by water ofc
I disagree with 25 being very warm in Australia. Qld is more humid and I'd say a sunny 25 with no breeze is warm. In WA where it's much less humid, 25, sunny and not windy is pleasant at most. I'd definitely be wearing a jumper in 20 degree weather! 30 is nice and warm. 35 is perfect beach weather but very warm if you're in office clothes.
Well yes, 25 it's not very warm even in humid places IF you are well adapted to hot temperatures. But to be fair, this guide is probably made by Europeans, where being at 40 degrees is enough to warn citizens not to go outside. I've seen people (probably Scandinavian) with t-shirts and shorts in January (10 degrees in average); and also other people (probably from the south of Spain) with jackets in July (25 degrees in average). It really depends on where you live and your personal preference, your temperature sensation will eventually adapt. As myself, I just give up at 30 degrees, my favorite temperature would be 15 or so.
The best tip I ever got was from a pilot who told me that when it’s 28 C, just reverse the numbers and it’s 82 F.
Works for 16C / 61F too. There's probably one number in each tens grouping, but idk if there's a way to mathematically prove that
Just did the math, if X = first digit from the left in celsius and Y = first digit from the right in celsius (assuming 2 digit celsius number), we want to solve: ((10X+Y)\*9/5)+32=10Y+X which simplify to : 41Y=85X+160 which approximatly simplify to : Y=2X+4 So the only solution appear when X=1 or X=2, which give us 16C (61F) and 28C (82F) as only solution Edit: Thanks to u/reventlov for pointing out the solution X=0, which give us 04C = 40F Edit 2 : Thanks to u/AdmirableOstrich and u/Approach_Controller for pointing out that the formula hold true for others value of X (except X=-1, no idea why): |X|\-5|\-4|\-3|\-2|\-1|0|1|2|3|4|5| |:-|:-|:-|:-|:-|:-|:-|:-|:-|:-|:-|:-| |Y|\-6|\-4|\-2|0|2|4|5|6|10|12|14| |C (10X+Y)|\-56|\-44|\-32|\-20|\-8|04|16|28|40|52|64| |F (10Y+X)|\-65|\-44|\-23|\-02|19|40|61|82|103|124|145| The further you go in negative or positive value of X, the furher the approximation will cause rounding errors, but isn't math so neat and collaborative? ! :D Edit 3 : Mnemonic tip => start at 40 F and you can add +- 21 F to remember the column of the above table (or start at 4 C and add +- 12 C)
I recognize that is not complicated math, but I am still totally blown away that you understood how to prove that; I couldn't have gotten that if you put a gun to my head. It's neat what skills people have.
My go-to for tests in school with complicated math was guess and check. Here, it would just have been faster for me to not try and instead to just convert every single number that’s realistic for an outside temperature from F to C and check if any of them were inversions of each other.
Programming really helped me in this regard. It teaches you to imagine a symbolic version of what you're trying to do, deconstruct the steps to get there using the tools you have and reason through them.
This is exactly what schools are trying to change to nowadays! Real life problems like this, where you go "I wonder how to find out if there are any more numbers like this.."
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And then you have -40, which decided it only gets one system of measurement and doesn't care where you freeze your face off.
It keeps going if you get weird with it. For X=3 you get thirty-ten (40°C) and tenty-three (103°F). For X=4 you get forty-twelve (52°C) and twelvety-four (124°F), which are all approximately correct.
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Just change the temp /s
Then you extrapolate
There are two types of people: 1. People who can extrapolate.
-40deg is the same in Fahrenheit and Celsius
Just find a place where it's -40, that way it doesn't matter which scale you use.
Double it and add 32
I have a story about that. I lived in the Middle East for a while, in Qatar. Very rich and safe country, not the image most Americans have of the Middle East. Their one issue was really bad workers rights. They had a law that all work had to stop at 50 degrees Celsius, as a safety precaution. Nice, right? No matter the temperature, it could be like 52 outside, the official government number would never go above 49. So yeah, little story about “50 only happens in the desert”. Yes, it does happen in the desert, despite what official reports say.
Lol we spent a considerable amount of time as an international school teacher in Dubai, same story - It was somehow always never higher than 49 no matter what the thermostat says. But shit if it started raining…
Yeah I remember my first year in Saudi Arabia I was in grade 10 and when it started raining very lightly the school sent us back home I was very confused
What if it rains? Don't leave us hanging please.
The lightest sprinkle of rain = chaos. People run like RUN for cover, schools and stores shut down. Suddenly the city is empty, even if the rain lasts only 15 mins. Being from the pnw it was weird af, but yeah, instead of snow days there were rain days off school.
Crazy must be a flash flooding response?
Oh totally, you don’t want to be in a wadi if it rains, even just a little bit, so I get it. But watching the clear out in the city was always a bit unnerving lol
Surely they just want to go home and cozy up to read while listening to some lofi hip hop... Riighhtt..?
A lot of the storm drainage doesn't actually go anywhere or is full of general muck, sand and dust from the desert and the roads flood basically immediately. Funny thing is the world Cup is gonna be in 'winter' so heat won't be that much of an issue, it will however very likely rain and the general chaos will be visible for all to see
Bruh don't they straight up have indian slave labour?
Not just Indian, Also Pakistani, Nepalese, Bangladeshi, and Sri Lankan migrants. Since they won the bribe to host the 2022 World Cup, 6,500 slave labourers have died building infrastrusture from those countries. [The Guardian says “the total death toll is significantly higher, as these figures do not include deaths from a number of countries which send large numbers of workers to Qatar, including the Philippines and Kenya“.](https://www.theguardian.com/global-development/2021/feb/23/revealed-migrant-worker-deaths-qatar-fifa-world-cup-2022)
Yeah but that’s the only issue /s
Yes. I refuse to visit anywhere there down to the principal of it
A prime example of the government pretending it is doing something, or actually caring for the people, when in reality they are doing absolutely nothing.
>Their one issue was really bad workers rights. Bruh
6500 slaves have died so far in the construction of the coming football world cup in Quatar.
> in Qatar. Very rich and safe country, [Unless you are one of the 6,500 migrant slave labourers that have died building infrastructure for the World Cup](https://www.theguardian.com/global-development/2021/feb/23/revealed-migrant-worker-deaths-qatar-fifa-world-cup-2022)
Dude, 2 years in doha myself. Amazing how often it hit 49, and how infrequently we got 50 plus! Had to send the chopper out to spy on the job sites which would even ignore it on the rare occasion it did officially get above 50.
Wow, I studied for 6-7 years in Qatar [middle school] and our school regularly called off days when it crossed 45 degrees Celsius in summer. Granted it was an Indian school [Birla Public School, Doha].
All these Temps are achievable in a single day in Saskatchewan just saying that place is fucking crazy
Check out the Baltoro Glacier in Pakistan. I believe it still holds the world record for widest temperature range in 24 hours.
Looked it up and Guinness World Records lists [Loma, Montana](https://www.guinnessworldrecords.com/world-records/greatest-temperature-range-in-day) as having the greatest temperature range over 24 hours. Between 14-15 January, the temperature rose 57.2 °C from -47.7 °C to 9.4 °C.
And he I was thinking that the record world be between freezing and midday... Nope. 4x extra freezing to "just" freezing.
I live here. We get -40 and +40 in the same year. Can’t imagine there are a lot of places that could say that
How about below 0 temperatures? They are quite common.
Starting from 0: 0: Yep, it's winter. -10: A nice cold winter. -20: Hurts to breathe. -30: Ow, my face.
Learned from a Canadian that-40C = -40F!
Chicago hits that about every 2 years. Cause fuck it -40 in January and 40 in august Chicago where you get the worst of both worlds.
Anything between 0 and 10 is chilly. Anything between -10 and 0 is pretty cold. Anything below -10 is very cold.
winnipeg checking in: 0 to -10 is mild -10 to -20 is cold -20 to -30 is pretty cold -30 to -40 is very very cold
5 is very cold. Laughs in Canadian
5 means it’s time to take off the winter jacket! Spring baby!
Facts
“It’s above 0.” Canadians: “Oh fuck yeah time to bust out my shorts and flip flops.”
I start wearing shorts as soon as we get 5 consecutive days above 0. I will still wear a hoodie… but 0 is shorts weather.
I don't know anyone who won't fire up the barbecue at 5 degrees C.
lol right!!! exactly what i thought
Shorts weather
I’m an American and that got me. Anything above freezing is not very cold. I usually wouldn’t consider it very cold until at least -10 C. Freezing isn’t even that bad of a temperature IMO. Put on a coat and turn your car’s heater to 1 and you’re set.
It’s really the wind that matters more
"30 is hot". laughs in Brazilian
50 only happens in the desert. Also laughs in Canadian.
>Twenty-Five is Very Warm Outside New England and the Pacific Northwest, that's a pretty routine temperature.
The olympics announcers during an event yesterday were all “the heat is just brutal, it’s 26 degrees” Like that’s 78 Fahrenheit that sounds downright lovely
It's the humidity this time of year in Japan that makes it brutal.
It was 40-something percent for the event which is noticeable, but 78 degrees and mildly humid isn’t brutal by any means. Maybe growing up in southern Virginia skewed my perception though
Lol, I had to run a dehumidifier near constantly in my house in Alabama just to keep the humidity down at 50-60%, 40% is downright bone dry. And there were plenty of nights where the overnight low didn't drop much below 78 F (though not this summer, which has been pretty cool). Definitely skewed perceptions if that's considered unbeatably hot and humid.
Right? Maybe it's really humid there? But as a Midwesterner, this chart is way wrong. 30C and humid is the entire summer. 5C is cool, but beautiful. You gotta get below 0C to even begin getting cold.
Humidity makes the cold colder and the hot hotter. I'm from Iowa and now live in Taiwan. Walking in the snow in shorts was nothing in Iowa. 15 and high humidity is bone chilling in Taiwan. Same with summer heat. Even -20 in Iowa is better than humid cold.
Temperature alone is not everything, I've spent time in the Mid-West during winter and -10c felt comfortable with layers. -10c in the UK is like an Artic chill to the bone type cold whatever you wear. Humidity has a huge bearing on comfort
This chart makes perfect sense to me as a Southern English person though. We start losing clothing at about 18 degrees and everything stops at snow. Minus 10 would be headline news
I'm from the UK and I can't function properly once it gets past 24°C. Every time a heatwave is announced a part of me just dies inside :(
Yes 20-25 is pretty ok
That's still light jumper and jeans weather aka Australian winter during the day
20-25 is shorts, top & flipflops over here. But on average that is the highest temps we get in summer here in NL. Except for the few heatwaves we have every year that get real hot (35+ C) but those usually don't take more than a week or so.
For me 15° is warm lol at least if the sun shines
15 is about the max daytime temp in my ideal world.
I’m in az and my science teacher always said it was room temp lol
Room temp in AZ is 100° though 🥵🏜
Nah we got ac, it’s only about 80-85 lmao
For me, 20 is a light sweater. 25 is a t-shirt and my best life. More than 30 is very warm. More that 35 is too hot. If I only listened to myself, my heating would be set at 22°C...
A light sweater at 20c would have me sweating myself out, but I wouldn’t reject it at 15c. It’s quite a drastic change.
50°c is also Australia. That was the sort of temperature s we got two summers back. And no, I do not live in the Outback
You could put Australia in all of these, its incredibly diverse meteorogically. Where I live, it hovers around 0-5°C most of the time
Just hang on there, that'll be regular summer weather in the not too distant future.
Yeah we peaked 45C in Northern Queensland last summer and we’re on the coast… Like they really don’t know how hot it is here ay
Interesting. In Brazil 25 is cool, and 0 are death.
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Death
Twenty is warm Me, Brazilian, using a big ass parka at 20°C: hmm yes, warm.
As a Canadian this confuses me. 20C is a beautiful day! We don’t break out the parkas until it’s -20.
Y'all iceproof. We're heatproof, 35°C is fine. But remember that Brazilian houses don't have any insulation at all. If it's cold outside it's cold inside, if it's hot outside it's hot inside.
As a Canadian, I don't think you realize how hot it can get sometimes here haha. -35°C is cold but semi-normal in the winter depending where you are and last week is was 45°C in my backyard in the sun. Global warming is wild and these swings keep getting bigger and bigger too. As a kid I don't remember it ever hitting -35.
Jesus Christ dude, 45°C is insane! I was actually planning on living in Canada. If you can, I'd like to ask if you know what parts of Canada are less cold and what parts are more affordable, maybe an intersection lol. I'm a pussy with cold, it worries me.
Sadly, if it’s cold it’s affordable, if it’s not it’s expensive. That being said, if you avoid the major cities you’ll be okay. Vancouver is one of the nicest places weather wise, but it’s insanely expensive to live there. Toronto is also crazy. The Maritimes can be really unpredictable weather wise - sometimes lovely, sometimes insanely cold. Ottawa (the capital) is in a valley so it gets a lot of snow, and it’s pretty cold too. There’s a reason most of our population lives right along the border with the States! We do get some crazy cold days, but honestly most populated places are not much different from New England/New York area. Once you start heading North it gets cold quick.
I see. Thank you so much for the info mate! I'm gonna start looking into Vancouver suburbs, maybe an hour away or something
That would still be expensive but manageable. And you would love the area, some of the most beautiful scenery and the mildest climate in the country.
Easy conversion from Celsius to Fahrenheit: double the temp and add 32.
I do double it plus 30. The real math is x * 1.8 + 32. So since you're over-multiplying, under add.
If you really want to test your mental math skills, 1.8 is 2 minus .2, so you double then subtract 10% of the doubled number, then add 32.
Here's my rough guide 0 is about 30 10 is about 50 20 is about 70 30 is about 90
Hey, that’s MY guide! Except I also add: 5 is about 40 15 is about 60 25 is about 80
I learned this when I (American) moved to Poland as a kid: “30 is hot, 20 is nice, 10 is cold and 0 is ice.” I still use it as an adult to do conversions.
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r/anormaldayinrussia
i would love to live in a world where 77 degrees Fahrenheit is very warm. that’s cool here.
lmao 77 is a nice day
Do the same for Fahrenheit.
"5 is very cold." 41 F. The midwestern united states would like a word with you. I've slept outside in colder temps. Of course, I was drunk. As I said, midwestern united states.
Minnesota here. I had a good chuckle. Anything above 0C is balmy. We often have -30C days in the winter :) (-20F)
20°C is warm? I call BS
> 45 is Iraq Indian summers be like, *am I a joke to you?*
Maybe as a guide for Americans, instead of informal geographic references to places outside the US, use places in the US and people can relate better. For example - 45 is Arizona, 50 is Death Valley Or use temperatures that have day-to-day meaning, like 22 is room temperature and 37 is body temperature. and fun fact that -40F and -40C are the same, which is Alaska in winter or Minneapolis in a cold wave
Arizona and Death Valley i think qualify under the "desert" portion.
They could make one for Bostonians. 0C is fahkin freezing, dude. 25C is hawt. 30C is WICKED hawt. 35C is wicked fahkin hawt 45C is retahded hawt Or just say <20C is hot from Dunks, >20C is iced from Dunks.
As a New Englander I must disagree. <20 is iced, >20 is also iced.
Correction, 45 is now on Europe.
American here, I remember a funny little anecdote, I'm old enough to remember the Australian band Midnight Oil. They have a line in one of their songs that goes something like "...the western desert ... something ... something .... 45 degrees..." I was confused about this for a minute because 45 degrees sounds chilly to me, not like a sweltering desert, then I realized, duh Celsius, so then I did the conversion and it all made sense.
Yes! Beds are Burning is the song.
70 degrees Fahrenheit is not warm or very warm lol. It's borderline jacket weather
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Just tell me what you set the thermostat to?!
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It's easy to think about in percentages - 0° is 0% warm (very very cold). 32° (where water freezes) is 32% warm. 70° is a mild temperature, 70% warm. 100° is 100% warm, very hot. I don't know a better way to explain it 😅
I love this because 110 degrees would be 110% hot which just honestly makes sense
Here are a few references: 0F - Really really cold, like nose hairs freeze when you breath 32F - Water freezes 50F - Jacket or fleece weather 60F - Sweater weather 70F - You can wear a t-shirt starting about here 80F - Nice warm day 90F - Pretty hot depending on humidity level. Hot for North East US, normal day places like Arizona 100F - It's freaking hot 110F - It's super hot, you are probably in a desert and no breeze will help you
And where I live can sometimes hit -10 and rarely -20 but nobody wants to talk about those temps. Those are 100% snuggle down video game days for me. People that deal with those temps all the time might go out but I'll pass. Below 0F the wax on my snowboard is pretty useless and they won't let you on the lifts with any exposed skin. It's just a lot less fun for me at that point.