I give Bemidji, Minnesota a 5% chance.
Also, I'm using the National Weather Service's definition of 1" of snow on the ground regardless of if it fell on Christmas Day as my definition.
Oh, I think that should be the real definition.. snow on the ground on Christmas. The chances of snow falling on Christmas are much much lower for any given place...
Christmas 2009 was awesome.. a huge snowstorm arrived mid-day on Christmas Eve day and lasted until the 27th... it made it feel so Christmasy.
In any case, as long as it's not warm. There's nothing more depressing than a warm, sunny, snowless brown Christmas day in my opinion. Sorry Australia!