A White Christmas in Portland. True it was only a couple of hours of wet snow fall with trace accumulations but it did fall on Christmas Day which for Portland is a very, very rare event. The last time there was snow on the ground on Christmas Day was in 1990. I remember that event because it was a cold spell that hit Portland about a week before Christmas with temperatures below freezing and quite a bit of snow and a silver thaw and temperatures close to freezing that allowed the snow to remain on the ground through Christmas Day. I can also remember two times one in 1983 and another in 1992 where snow fell on Christmas Eve during a pre-Christmas cold spell but then melted in the warm wet weather that followed so that no trace remained on Christmas Day.