I ride to work almost every day and every weekend. It hasn't been too cold yet to keep me inside. The coldest temps have only been ~20F (-7C). Just wear layers.
On the weekend I wait until about noon to ride so the temperature can start climing. Some days it climbs into the high 30s - low 40s (~4C), some days its in the 50s - 60s (12-16C).
This week the morning lows have only been ~40F (4C) and the ride home temps have been ~65F (18C). I'm lovin' it!
