I will pretty much ride in anything and have done so. Rain, sleet, snow...been there and done that. Last year I commuted from the 'burbs to downtown and had quite the variety of weather! I found that as long as I was dressed properly, I could handle the cold and wet; if I had fenders and studs, I could handle the cruddy roads and it worked out pretty well.

I am with Lisa and that as long as the roads are clear enough, I'll be out for some mileage.