... when you see someone driving in mid-winter with their front driver's side window down.
Yeah. It's minus hella cold here, but as soon as my breathing makes the windshield start fogging up, my side window has to come down.
(I took the car into the shop yesterday, but I'll need to leave it over night, and that's best done on Monday. Apparently it's so cold that before they work on certain sorts of stuff they need to have the car warm or things are brittle and break. Who knew?)