I've lived and worked 4 degrees off the equator in Nigeria and Angola. Hot and steamy was the norm. I'd go out in the midday sun in Nigeria and jog around a two mile loop. I did that practically every day at lunch. No big deal. Several of us did. People really suffered on the rare occasions it dropped into the upper 50's. That was not often.
I worked in Kazakhstan where the coldest temperature I was outside walking around in was -20 Fahrenheit. As long as the wind was not blowing and you were dressed for it that wasn't bad. Wind made it miserable and dangerous.
I spent a year in England when the temperatures got up into the 80's for about a week that summer. People, especially old people, were dying from the heat wave. Housing and clothing were just not set up for that type of extreme heat.
The coldest I think I ever was came when I was living outside Cadiz Spain in 90 degree Fahrenheit weather and flew to Edinburgh Scotland where it was right at freezing and spitting snow and mist. The wind was pretty strong. I was dressed for it but certainly not acclimated.
The most I think I suffered from the heat and humidity was when I was in the army in Korea. I was on guard duty when we were in the field, sitting in the shade of a tree. I reached over for my canteen of water and was instantly soaked in sweat for that exertion. I was 22 and in great shape but I'd been spending too much time in the air conditioned communications bunker.
Last Sunday afternoon when it was right at freezing and a few snowflakes were drifting down I went on a hike with a retired geology professor across the side of a mountain. There were 29 of us and we were protected from the wind. It was a great day and a great hike. The last and only geology course I took was the fall of 1969 but I took several soils courses in engineering and occasionally worked with geologists on some projects. I remembered enough that the geology was really enjoyable. I understood most of what he said. Of course he dumbed it down a lot since most of the people had practically no geology at all. More of an 001 level instead of a 101 level and plenty of good stories.
We live in a wide variety of climates and we ll spend time outside. We have to adjust to the conditions where we live, whether that is avoiding driving on ice, avoiding an dangerous cold wind, or dodging a hot noonday sun. I'm fine where I am now with four seasons. The coldest we've seen so far is +10. It was barely above freezing when I woke up this morning with no wind. I'll be working outside today since the wind is pretty calm, cleaning out the chicken coop for sure and probably removing dead stuff from the garden.