What's the coldest weather you've walked a meaningful distance in?

[Vosem]

I jog 3 miles on a daily basis regardless of the weather. Last year, there were several days of windchills in the -30s. The first day I wore two pairs of sweatpants, two hoodies, gloves, boots to tuck my pants into, and a ski mask. I started sweating before the end of the first mile and was unbearably hot by the end. The second day, I wore just one hoodie, and replaced the pair of sweatpants "underneath" with pajama pants, and the ski mask with a hat. That was better.

The lowest temperature walking would've been one of those days, when I didn't have a parking permit to park at the school and so would walk the maybe kilometer and a half (bit more than a mile) to the police station, where I could park my car without a permit. It was interesting, since I would walk with others, and frequently people dressed more warmly than I, who were sometimes more athletic than I am, were still much more...responsive...to the cold.