These things are meant to be driven, rain/cold is not going to hurt them, its the goddamn salt/calcium/crud all over the place in the winter that will eat them. If none of those are present, hell drive it. You could always just put all seasons on the stockers and then get a nice set of aftermarket Shelby or Vossen or whatever rims with Street Comps or something for the summer. Best of both worlds.
2000 Mustang GT Steeda build #48. Bolt ons, suspension, Novi 2000.
Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.