I live in Pennsylvania and I occasionally play in the snow. I find myself doing a lot more sidearm throws because I have trouble getting my footing down for RHBH throws in the snow. Playing while it's snowing is the best!
Snowy and icy conditions are a great reason to work on standstill RHBH throws, it takes some getting used to if you always run up to your shot, but it's a useful thing to have in your arsenal anyway.