Well, I would not recommend anyone to go swimming or have a nice tea-party in the rain, but a few drops of water or a little snow doesn't do any damage
Just make sure to ALWAYS clean and brush the fur after every outing! That'll keep it nice and fuzzy.
Side note: Only if the fur is "Air-brushed" water is reaaalllllly bad! (Air-brushed is something like special spray-paint)