I stayed one winter, in Bismark. That got way down there, but I still wasn't cold, so long as I wore winter style clothing. Interesting place - I got stuck in snow, twice in one week and needed towing, then the cam sensor went late one night, and I needed towing again, - 31º, dark, and no engine. First emergency towing I had ever got, they arrived in 25 minutes. ( I still wasn't cold, but was getting there. )