I don't remember exactly what the temp was, but the wind was howling. I was going hunting and had forgotten my face mask. You could lick your lips and feel your mustache freeze. Anyway, we had an old school bus converted to a camphouse and I decide I would check and see if anyone had left a facemask or knit cap in there. When my feet hit those metal steps they just froze to the surface. I said nope, and went home.