It is predicted to be cold and wet on the days leading into Christmas but clearing up on Christmas day. For those of you hoping for a white Christmas, the mountains are expected to receive snow in the nights before. There could be 1-3 inches of snow as low as 3000-3500 feet and the possibility of a foot of snow above 6000 feet.
Source: Pasadena Star News; Cold, wet weather hanging around SoCal for Christmas