I recall a mid November ride in the mountains of NC at Maggie Valley - the Blue Ridge Parkway was closed due to snow. (Riding in snow was not as bad as I had imagined it would be.) A few days later, it snowed while I visited Charleston, SC. Both occurrences of snow there are fairly rare though (as compared to, lets say, the VT / Canada border)
It was probably my fault - a northern states yankee drafting the snow along behind him.
"Where ya from boy?"
"Um, Key West?"