Here is [link|http://www.wunderground.com/history/airport/KDCA/2000/12/25/DailyHistory.html|Christmas 2000] in Washington, DC and it seemed to be barely below freezing.
Please don't think that I am being a jerk. But I happened to be walking around in [link|http://www.wunderground.com/history/airport/KLEB/2000/12/25/DailyHistory.html|this] and I know that the Pacific Northwest didn't come within a mile of comparing to that. (Their site does not go back to 92/93, which was when I learned what -20 is like. Not a fun memory.)
Cheers,
Ben