Washington Annual Temperatures and Extremes

City

Avg High Temp

Avg Low Temp 

Avg Annual Temp

Avg # days > 90F Avg # days < 32F  Record High Temp Record Low Temp
Olympia 60.4 39.5 50.0 6 83 104 / 1981 -8 / 1979
Quillayute 57.3 41.1 49.3 1 60 99 / 1981 5 / 1985
Seattle 59.3 44.2 51.8 3 34 102 / 2009 0 / 1950
Spokane 58.0 38.0 48.0 20 128 108 / 1928 -25 / 1968
Walla Walla 63.5 43.4 53.5 40 70 114 / 1961 -14 / 1968
Yakima 63.1 36.4 49.8 33 150 110 / 1971 -25 / 1950
  • Washington's annual average temperature - 48.26 degrees, 34th warmest state in the U.S.
  • Record Hottest year in Washington - 1934 / Avg temperature 50.91 degrees
  • Record Coldest year in Washington - 1955 / Avg temperature 44.85 degrees

Washington's Temperature Records

  • Hottest temperature ever recorded: 118 F, Ice Harbor Dam, southeastern Washington, 8/5/1961
  • Coldest temperature ever recorded: -48 F, Mazama, northern Washington, 12/30/1968
  • Hottest location ranked by highest average annual temperature: Kennewick, southern Washington, 54.1 F
  • Coldest location ranked by lowest average annual temperature: Stampede Pass, west-central Washington, 39.7 F
  • The average temperature in Seattle during January 1950 was 34.4 degrees, making it the coldest winter on record
    During this month, Seattle experienced 18 days with high temperatures of 32 degrees or lower

The average annual temperature in Washington ranges from 51 F (11 C) on the Pacific coast to 40 F (4 C) in the northeast. The lowest temperature recorded in the state was −48 F (−44 C) in Mazama. The highest recorded temperature in the state was 118 F (48 C) at Ice Harbor Dam. Both records were set east of the Cascades. Western Washington is known for its mild climate, considerable fog, frequent cloud cover and long-lasting drizzles in the winter, and sunny and dry summers. The western region occasionally experiences extreme climate. Arctic cold fronts in the winter and heat waves in the summer are not uncommon. In the Western region, temperatures have reached as high as 112 F (44 C) in Marietta and as low as −20 F (−29 C) in Longview. 

The warmest year statewide was 1934 when the average annual temperature was 50.9 F. The coldest year was 1955 with an average temperature of 44.8 F. 

 

Washington precipitation averages and extremes, Seattle climate extremes/averages, precipitation and temperature data for all U.S. states
 and Top 10 U.S. climate extremes

Data source: National Climatic Data Center