30C is normal but slightly annoying, 30F sucks.

- A Floridian

A lot of it depends on the wind chill factor. On a calm sunny day— -10F (that's -23C for those in Houston, TX)—can be very pleasant. But with a damp 25 mph (3.727912328e-8 for those in Tokyo) wind and 60F (that's 127 Delisle for those in the EU) temperature, it can cut right through you. We send 5 year olds out to play at -10F as long as the wind chill isn't more than -15.

Source: I live in northern Minnesota, just a bit north of Frostbite Falls.

When tau says it is 2pi outside…

40 below the lowest possible temperature? -313.15°C

What's funny is that I used to live in Phoenix for a year. I would happily take the higher dry heat over the almost as high wet heat. When I lived there it was like walking into an oven and you could feel your sweat pours opening. But the sweating evaporated quickly and provided cooling as long as you stayed hydrated. Shade works and you can see how the natives protected themselves from the sun and had passive cooling that worked. In the wet heat it is more like Satan is pissing on you and you have no hope. Your body is dumping sweat and it does nothing because the humidity is too high to evaporate. Shade? Worthless beyond the immediate sun protection. A few degrees at most. Without AC you will only cool with high winds or a fan.

Fun fact I never knew until living there: when it hits 112 (and it does) the airport has to partially shut down and divert all non-high-temp aircraft. The tarmac is so hot it will pop normal tires at a high rate. So unless you have the expensive higher temp rated tires for planes based out of high temp areas, then you can't land there when it is too hot.

I mean, we don't need it. People survived for hundreds of thousands of years without AC in harsh climates. Our adaptability is one of the reasons we're the dominant species.

Those temps are not abnormal for that part of Texas in the summer. We did have a few years of relatively cool summers, though.

Water boils at 100 centigrade or 212 farenheit. Try again.

That sucks. Yeah - we have those temps in Texas for months at a time, but at least we have air conditioning most places.

It's also one of the reasons development is so hostile for pedestrians and cyclists here. We design everything around taking air conditioning with us wherever we go, which leads to car-first development.

Oh shit. Honestly I feel more for you guys than me. We have infrastructure built for it. Everything has AC. I even just put a window unit in my bedroom to take some load off the older main unit that has been struggling to keep up. But over there you were never built for that kind of heat. I wish you all the best with climate change.

Yeah, it's definitely brutal if you're not acclimated to it.

I am in the sciences. I support measuring in C and accept its rational design. But being American I also understand the appeal of F. Of the two scales it best describes the human experience. When we are talking about the weather and how it will impact my very human day, I want F. When I an measuring my whatever-the-fuck-else for science I want it in C.