As I sit on the now winterized front porch at my parents' place in the Pocono Mountains, looking at maybe 2 inches of new snow on the ground, it's making me think. A couple of inches of snow is no big deal here on the east coast (the west coast is a whole 'nother ball of wax).
I pretty much ignore seasons and weather in my games unless they are there to set the mood. I haven't snowed a party in with a 4' snow storm since my high school / early college years (damn you Dragon Magazine of old!)
The thing is, you don't need 4' of snow to make folks miserable in a fantasy setting. Half a foot is going to make travel a real pain in the ass. Flooding and muddy paths and roadways after the snowfall is probably even worse.
Then there is the Weather Control spell. Just think of the advantages a village / town / city could have if it controlled it's own weather. Walk out of a snow storm in a brisk spring day with birds chirping and the sun melting the snow right off your cloak.
On that note, I should step out into the 15 degree weather and clear the snow from the patio and my car. I do want to be home in time for the Super Bowl.
So, hand wave or heavy hand for your weather?