@M. Frary
It IS a contest. LOL
Coldest I ever experienced was in 1980-1 or 1981-1982 winter, I forget which year. Had to travel for work, sort out a problem at a paper mill in Rhinelander, Wisconsin.
Real temperature that night reached -44 F (that's -42 C for the rest of the world) the wind chill was at least 20 degrees colder. The team leader decided it was a good time to go bar hopping that night. It was positively dangerous to take a deep breath. Searing pain as you inhaled. I was terrified that the rental car would not start and leave us stranded out in the woods, outside Rhinelander. But I survived.
Curious, that around - 40 F the numbers for centigrade become about the same - 40 C.