I carpool kids to school 3 or 4 days a week and rarely get to do a lot of weekend riding, so weather is usually not a determining factor for me.I have commuted lots of days when the temp was in the 20's and once when it was about 9 degrees. I went down on some black ice a couple of years ago and that kind of took the thrill out of shiny asphalt for me. I will ride in the rain, but I have a nice truck too.
