Zero.

This morning was my first really cold winter ride of the year. Really cold. It was hovering around zero when I rode in - and windy. The wind chill factor was between -15° F and -20°F.

The road conditions were worse than the temperature. Just a few days ago, temps were around 50°, so the roads were pretty warm. Yesterday, it got cold quickly and snowed - and it turned to a layer of glaze ice on the roads. Lots of accidents last night, and it wasn't much better this morning.

I took a route that keeps me off the main roads for all but the last mile of my ride, so at least I didn't have to deal with a couple of tons of steel sliding at me. I just had to worry about keeping myself upright, because I still haven't put the studded snows on. Another evening project for this week...