I've been commuting on the same bike for the last six winters. Starting number seven this year. If you get a bunch of snow on the bike you just brush it off with a broom. I rinse mine with a gallon jug of warm water. I pour it over wherever the left over snow is at. You may get a few screws that might rust. But most bike parts are made of aluminium so no need to worry there. And most frames are a lot hardier than you might think in winter.