See https://github.com/CleverRaven/Cataclysm-DDA/issues/16924
As far as I can tell, not only is body temperature broken on a mechanical level (Feeling only Chilly in 31 F weather with 29 mph winds while completely naked) but Frostbite simply never occurs even in the worst case scenarios. Furthermore is that there is no hypothermia mechanic to speak of. All in all, cold temperature is nothing more than a nuisance - an annoyance, rather than something that can actually kill you. I’m pretty sure this needs to be fixed by the time 0.D comes out. The idea of being able to go out, at night, during winter, in New England, completely naked, and to be basically okay is…not only stupid, but goes against the spirit of the game.