As long as we're on the 'the coldest I've ever been' contest, lol, found myself in Great Falls, Montana one year serving in USAF. Got down to -40 degrees for a couple days. Base operations were shut down; only went to chow hall & back. Did have the proper gear for it tho, full arctic gear which included a nice wolf fur-trimmed parka/pants/ inflatable 'bunny boots'/ gloves, etc.
Growing up, we would get the weather report for the northern panhandle of Idaho around Lewiston; minus 60-70 degrees sometimes, yikes!
Personally, one Feb I spent in New Jersey beats them all. Wasn't the air temp, but a combo of wind chill & humidity. That cold NE wind off the ocean went right thru this tourists' ski parka & I found out what bone-chilling cold felt like. Must have been the reason our small tourist group was the only living things out on the beach that night.
Oh, the specs are bifocals.
Best,
HeyDan