Coldest day for me so far (I think) - was -1/0C when I left, almost stopped to dress up/ turned back to home when I felt the cold wind cut through me and saw a few flakes of snow. After a couple of minutes, I was plenty warm and glad I hadn't stopped to bother with the fleece.
Had some pretty cool winds, and was still cool when I got to the office, was a nice ride in. A lot faster than I had imagined, as I was consciously not pushing to avoid getting 'cold sweat-back' when stopping, everything seemed to work out nicely though - 32 mins 14.7mph avg. Saw a grand total of four bikes, one on Broadview/Bloor area, who I had a brief chat to - nice chap, asked me if I rode through the winter "First time this year" I replied, and asked him - he said days when it didn't snow he rode. One other guy looked like a commuter of sorts and the other two must've been couriers on an earlier start.