Monday, December 22, 2014

By the Numbers: Boise's Christmas Weather History

Posted By on Mon, Dec 22, 2014 at 9:53 AM

Yes, there is a chance of a white Christmas, with the National Weather Service forecasting a mix of rain and snow for Christmas Eve and Christmas Day in the Boise area. Daytime highs should be in the lower 40s today and Tuesday, but a cold snap will drop temperatures below freezing by Christmas, turning overnight rain into snow.

The National Weather Service has chronicled conditions for the last 136 years and Boise's snowiest Christmas occurred in 1998, when more than six inches of snow fell on the Treasure Valley. Other white Christmases included 1966 (3.2 inches of new snow), 1983 (2.9 inches), 1943 (2.7 inches) and 1904 (2.7 inches). 

Boise's coldest Christmas on record was in 1990, when the temperature plummeted to 20 below zero. The warmest was in 1885, when Boise hit a balmy 60 degrees on Christmas Day. 

The average high for Christmas in Boise is 36 degrees and the average low is 22. The average snowfall has been two-tenths of an inch. The historical probability of snow on Christmas Day in Boise is 17 percent.

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