It was 10F, -4F windchill. But sunny bright and beautiful. I went in a little late, hoping the sun would melt some ice. Only patches of ice, and not on the turns. I humbly have to say I finally got my clothing right, I was nice and comfy. I also thawed my bike out for about 20 min so I had at least 4 gears but the rear der was freezing up toward the end. I was working on how to breath through my neoprene face mask without fogging up my glasses. There is a bigger space for my nose than mouth so I found if I breathed in through the mouth and exhaled forcefully through the nose, then there was enough wind to clear my glasses. It's the details that makes the commute! ps--I'm also a believer in Thinsulate. New Thinsulate lobster gloves work great in -4F!!! I wouldn't have believed it looking at how thin they are.