Amps If the air is dry, it just doesn’t feel as cold, something usually experienced at altitude. Had a large foreign cigarette outside at -20 in the alps just wearing a t-shirt, no bother. +10 in a damp UK feels far colder.
Funny you should mention that you were able to wear just a t-shirt at -20 when the air is dry:
In line with the lengthy post I made a while back about wet bulb temperatures, if you weren’t wearing any clothing at all then you should actually feel warmer when it’s cold and humid:
it’s actually the dampness getting in to clothes which makes you feel colder, as the moisture means the clothing insulates less via facilitating heat transfer / heat loss (as if the clothing is acting similar to when we sweat to cool ourselves down). When it’s cold and dry then clothing works more effectively at insulating warm air around your body.
If you weren’t wearing clothing on a cold, humid day then the moisture in the air would actually stifle your body from losing as much body heat through water, which would keep you warmer than if the air was dry - when the heat will escape from your body as water in to the air more easily.
https://www.weathernationtv.com/news/dry-cold-vs-humid-cold/
