I grew up in Minnesota. On one New Years Day, we went snowmobiling. Air temp was -30 F. (Note, this was the actual temperature and not "what it feels like). We were cruising around 30-35 mph. So, the air-chill factor had to be much lower. The wine skin container laying on the engine froze solid. As we raced about, there wasn't a single inch of skin exposed. I had trouble with the moisture from my eyes making my goggles from fogging up. We stopped to have a wiener roast and I used a pocket knife to sharpen a twig for holding a wiener. It was so cold that the blade snapped. The wiener broke in two.
I know that this is a thread on being really hot, but I've experienced both ends of the spectrum. The coldest I've experienced was -55 F. The propane tank had trouble "gassifying" enough propane to run the propane furnace.