I’ve lived through -39 in Bozeman, Montana once...
As they say, when we spoke, our words would freeze and drop to the ground, not thawing until Spring (read July). As the built up words thawed, it sounded like crowds of people shouting outside.
It was 29 degrees in Atlanta this morning ... 50 higher than in Billings, MT where I grew up.
1964.... 54 below.....Gunnison Colo.