it’s normally 14C indoors at night.

I live in Canada, and I am massively heat intolerant. I also suffer from hyperhydrosis, where any temp over 26℃ eventually makes me look like a drowned rat. Like, literally. You put me in a room at 28-30℃ and within about 10 minutes of not moving a muscle my entire face is beading off sweat like someone just dumped a bucket of water over my head, and my shirt is soaked right through.

14℃ is the lower limit for shorts-and-t-shirt temps for me, and represents the ideal shirt-and-tie office temp. It’s also the best temp for heavy physical labour with my shirt off, as sweat can actually have a chance of evaporating faster than I produce it, especially with some sort of a brisk wind. Sweater or business jacket temps start at 6-8℃, and it is only with a cold, super-moist wind that I throw on any kind of a winter jacket above 4℃.