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Blue Mountains Climate
Temperature and precipitation correlate strongly with elevation in the Blue Mountains ecoregion. Higher reaches are wetter and colder than lower ones.
Along the river valleys, precipitation ranges from 9 to 18 inches annually, while in the nearby mountains it can reach more than 100 inches a year.
Average temperatures vary from 28 to 52 degrees annually. Summers, particularly at lower elevations, can be very hot and dry.
For details of this ecoregion within Washington, click a subheading in the left column.
View the more general description of this ecoregion in North America
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