Cool -4C with a windchill of -12C but the worst part were the gusts of winds up to 60kmh (40mph): it took me an hour to ride in this morning because 1/2 the ride was into the wind.
Yesterday on the ride home, my tail light housing fell apart: I heard the plastic fall onto the road after going over a pothole. I was able to retrieve it and last night, hot glued it but this morning's winds blowing tin cans and plastic bottles around the street (for most of residential areas on my ride, today is garbage/blue box pickup day), I kept thinking that my light fell apart again or something else fell off the bike.
We're being hit by that storm that went through north-central US but so far, it is just high winds and some drifting snow, no significant snowfall yet.