There's a lot of bullshit in this thread. People can wear shorts in cold weather either a) if it's not that cold, or b) if it's not for a long period of time. I've been in -50 and -60 degrees fahrenheit weather in Alaska and Montana and Wyoming and when it gets that cold any exposed skin is a huge liability and will become frostbitten and/or severely painful in a very short amount of time. Left untreated it will turn necrotic which is not good. You also, pretty much no matter what you're wearing, can't stop moving at those temps unless you are in some kind of shelter.

When I worked on The Slope in Alaska back in the 90s we used to do 20 minutes outside and then 20 minutes inside for full 16-hour shifts.

That said, it can be kind of invigorating and of course you do get used to it and learn to not let it bother you.

Edit: Also, if anyone cares, I'm not proud of having worked for Big Oil on The Slope back in the day. At the time I was young, it was a big adventure and it paid big money that allowed me to do a lot of other things that I otherwise would never have been able to do. Also, it was all union work through IUPAT DC5 which I am still an active member/activist of today.