While it is odd that a school called the University of Southern California would claim to know anything about a traditional snowy winter, this video is chock full of information. Including the connection between Christmas cards and sheep.
USC's Dornsife College of Letters and Sciences interviewed a bunch of professors in disciplines from physics to philosophy about winter, and put all the best bits in this video. Do you have a favorite winter fact that's not in the video? I, for one, did not know until recently that a Pineapple Express was a real meteorological phenomenon and not just a movie title.