I've always had a White Christmas (well, one year, it was barely a dusting - but there was still snow!) and it's usually in the 20s-30s. We just moved, but to a similar climate, so I have hope it will be a White Christmas this year too! :)
We haven't had a white Christmas in I can't even remember how long. Last Christmas, after dinner, it was warm enough to go to the park, without jackets. It was a nice day, but I want a white Christmas! =)