European here! For me it's...
Celcius:
0 = Water freezes
100 = Water boils
Fahrenheit as far as I can tell:
~100 = Hot enough that it shows up on the news
~400-450 = Cooking, because our stove is in Fahrenheit for some unknown reason.
All other temperatures in F = no idea.
You can think of F as a “% hot” measurement for weather.
0 = no heat: getting dangerously cold for humans. 50 = half hot, half cold: wear long pants and a jacket. 75 = three quarters hot, getting close to t shirt weather. 100= fully hot: getting dangerous for humans.
Yes you can go over or under, but you can consider those to be extreme weather (120% hot!)
C is a measurement for water.
Acclimatization is a whole thing. I remember thinking 65F / 18C was cold once upon a time, then I moved north and now only bother putting on a jacket if it's below 40F / 5C or so (but now I start seriously suffering above 85F / 30 C where that used to be my ideal temp).
People who pretend certain temps are objectively not that cold or hot have never moved from one climate to another, I think. The person you replied to must be from a hot area.
I spent a week in the Rockies and when I got home, my house at 24°C was just too damn hot I just drank ice water and sat in my underwear.
Yep. I lived in the middle East and SE Asia combined for around 12 years, and while occasionally it was too much, in general I loved the heat and rarely said "its too hot", I moved back to the UK 3 years ago, in June. Hated it, was cold all the time. Now when it's more than 25c / 77F on a calm and clear day I'm boiling and can't sleep at night (barely anyone in the UK has ac at home).
But what can you do if your area climate includes 110+ F summers and below 0 winters? Besides moving, that is.
It really depends on what your body is acclimated to. When I lived in Texas it felt a little too cool to be t-shirt weather. Now that I've been living in Seattle for years, it's safely within the realm of t-shirt weather.
Fahrenheit is designed for humans. Celsius is in love with distilled water at sea level. Kelvin and Rankine are actually useful in math, science, and engineering.
My wife told me to go look at the thermometer outside and the needle was pointing to 0. She asked "what temperature is it?" I said, "uh.. there isn't one."
Sorry but that makes no sense to me.
Is 0% hot no extra heat, like perfect room temp or is it zero heat, the death of all life?
What does 100% hot mean?
You arranged it for yourself to make sense of it, but no need to rationalise it. It's only good, cause you're used to it, or doesn't "feel more human" than Celsius.
I've been in a sauna with 100°C ( what's that? 250°F?) It's doable, but that's probably my personal max. So 100°C air temp is now 100%? Mmmh doesn't really work that great.
All in all, temperature unit is just data points, the interpretation is individual. Fahrenheit is not "more suitable for humans" than any other unit.
I’m sorry you are having trouble making sense of it. It’s honestly a very simple concept.
Fahrenheit
0 = Well below freezing, about as cold as it gets anywhere that isn't frozen year-round. Dress like you're climbing Everest.
25 = Just below freezing, very cold but not record breaking anywhere people own snow shovels. Bulky jacket and gloves.
50 = Cold to cool, depending on your baseline. Put on a thick sweater or a jacket.
75 = Perfect, slightly above room temperature. T-shirt and shorts.
100 = About as hot as it gets anywhere that isn't a desert. Tank top and sunscreen, and stay in the shade.
If you are regularly encountering weather that is boiling the water in your body, you may want to consider moving to a nicer climate.
Wait euro ovens are in Fahrenheit as well? I just thought it was our identity crisis measurements in Canada.
Nah, mines in Celsius ... the poster above probably has an old British oven, they had a lot of hold-outs for imperial measurements.
Fahrenheit is nice for the ten degree ranges when talking. "Tomorrow it will be in the 70s". The entire range of the 70-79 is fairly nice and similar. Every ten degree range is meaningful and different. "Tomorrow it's in the 90s! :("
Having used a lot of Celsius and metric in college sciences, they don’t bother me so much. But when it comes to certain applications, I’m more used to farenheight. For example temperature as it relates to human comfort.
Like I know 35 c is hot, and anything in the 40+ is miserable. But I also know I prefer temperatures to be in the 72-75 range for optimum comfort and thus have to do a bit of math if I need that in Celsius.
Toronto is basically due east of where I live. 10C is pretty nice out. Hell, sometimes I don't wear a coat when its 0C
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Same, but I'm in Scotland. I was out shovelling snow in a vest and leggings and my neighbour who was dressed for an arctic expedition was horrified.
I'm just built for a different climate.
If it's also humid, then yes.
But I think those numbers define the start of those regions. So 30 is when "hot" starts.
Those numbers are easy to remember with what they mean. 0, 10, 20, 30 is an easy sequence. So is "freezing", "cold", "warm", "hot".
It's an easy guide to learning Celsius in a little more native way. The translation to Fahrenheit is provided, but not intended to be explicitly memorized. You can always do the C * 2 - 10% + 32 = F mentally if you really need to.
I'm not American so I won't be converting to F, but I somewhat agree with the person I responded to that 30°C / 86°F is not really hot... unless it also happens to be humid, in which case, that temperature can be quite uncomfortable.
Here's celcius
Water:
0° - freezes
100° - boils
Me:
10° - freezes
30° - boils
Why can't I be more like water?
This is why Fahrenheit is great. It's a 0-100 scale for the temperatures humans typically experience with bonus off-the-charts temperatures for when it's particularly miserable
Cause 30C is warm but 39C is heat stroke. Bigger range than 80-89F (warm to really warm), 90-99F (hot to really hot), 100F+ (heat stroke hot).
We don't even need that for weather. There's not that much of a difference between 21 and 22 C, and anyway with wind and shade you can quickly have a difference of a few degrees.
That's why weather is not just temperature, regardless of the used scale. But to ask you the same, what's the difference between 110°F and 111°F?
Oh no, I agree with you! I don't understand Farenheit at all. I like Celsius because it makes more sense in terms of definition, and having "negatives can have snow, positives can't" is convenient.
You might think there is no difference, but someone will definitely notice if you adjust the thermostat by 1°F.
I've never heard anyone casually refer to air temperature either; its mostly always how fast the wind is on the Beaufort scale.