I have lived all My life in venezuela so i don't Even know what feels like a temperature under 12° C hahaha but i do know how 38 - 40 °c feels hahaha and yes it is horrible! We had to use ice in our face to cool off
Discussion
Minus 40 in a tent is what we experienced haha, but when you know how to do it & your body is still young it can actually be great :-)
I would not have a problem living off grid outside of the tropics at all, it’s a great experience BUT resources is different, firewood & food would be literally everything 24/7
But off grid close to where that can be bought? No problem, done that a lot!