I have been caught in the rain when I have been out riding before and I hate it. It's not that I mind getting wet, but it seems as though it makes the roads here particularly slippery. I feel that it is too dangerous of an activity for me if it is raining more than just a mere sprinkle. Plus, I share the road with motorists who often do not pay any attention to cyclists. Rain lessens their visibility. In fact, around here two or three people have been hit by motorists while riding and most were during times of decreased visibility for one reason or another.