having lived in a messy snowy area once upon a time - I would also ask "is there any snow on the route?" You can always use the snow to ride on as it provides traction. I ride on a bike trail the whole way to work and some days its Gorgeous, some days in the winter I do NOT want to know if that was water or ice I just rode over - its just best that way! As theres only me and my cell phone - I ride pretty much as often as I can! (but I'm down with a cold right now so riding isn't in my forcast! - its a breathing thing ya know?!) Anyway - like everyone else said....if you have an option and it Isn't your only means of transportation - you gotta make the call based on your level of comfortability - after all, in the end it isn't gonna matter if you rode this day or that one or drove!