With the talk of low snow levels this week, it's a good time to talk about what is considered normal for the Rose City. Normal is defined as average snowfall from 1981 - 2010 at PDX.
November normal snowfall: .2 inches
December: 1.3 inches
January: .5 inches
February: 2.1 inches
March: .2 inches
Normal Annual Snowfall: 4.3 inches.
It should be noted that snowfall in Portland is highly inconsistent. Many years may see only a trace of snow, while others have huge snowstorms. The photo above was taken in Clark County back in December of 2008. Snowfall that month broke records with 19 inches falling and a snow depth on Christmas Day of 10 inches!
Dating back to December of 2003, many years have seen at least some snow the last two weeks of December. Although February is listed above as Portland's snowiest month, recent years have seen snow of 2 inches or more mostly in December and January.
The statistical chance of seeing more than a trace of snow fall on Christmas Day in Portland is less than one percent. Records show a slightly better chance of having snow on the ground going into the holiday. The white Christmas treat of 2008 was indeed rare and beautiful!
KGW Meteorologist Rod Hill