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.
Four wheels move the body, two wheels move the soul.
2010 Kelson custom/Brooks B17 Imperial
2009 Masi/Terry Damselfly
2004 Specialized Dulce Elite/Terry Damselfly
2003 Gary Fisher Tassajara/unknown saddle
1987 Bridgestone 100/Terry Liberator X