IMHO, there are legitimate safety issues associated with riding in rain, sleet, snow, ice, fog, etc. I am not willing to take such risks unless they are unavoidable (eg, getting caught in a thunderstorm while enroute). I need to wear eyeglasses and have trouble seeing through them when it's raining, sleeting or very foggy. Drivers also have a harder time seeing cyclists in heavy rain, snow and fog. I tried to ride my mountain bike once after we got about 6" of snow and sleet, and I had trouble pedaling only a few hundred feet. After I fell over, I walked my bike back home. We don't get that much foul weather around here, so I don't mind taking a few days off riding when we do.