Washington Climate Data
NOAA 30-year climate normals for all 39 counties.
NOAA NCEI 1991-2020 Climate NormalsState Avg Temp
50.0°F
Hottest County
Benton County
53.9°F avg
Coldest County
Ferry County
43.8°F avg
Wettest County
Grays Harbor County
100.3" precip
All Washington Counties
Adams County
49.8°F avg
Asotin County
49.3°F avg
Benton County
53.9°F avg
Chelan County
48.0°F avg
Clallam County
49.3°F avg
Clark County
52.0°F avg
Columbia County
51.1°F avg
Cowlitz County
53.2°F avg
Douglas County
49.1°F avg
Ferry County
43.8°F avg
Franklin County
52.2°F avg
Garfield County
49.8°F avg
Grant County
51.7°F avg
Grays Harbor County
50.6°F avg
Island County
51.2°F avg
Jefferson County
50.9°F avg
King County
51.3°F avg
Kitsap County
52.3°F avg
Kittitas County
46.4°F avg
Klickitat County
48.3°F avg
Lewis County
51.2°F avg
Lincoln County
46.5°F avg
Mason County
51.3°F avg
Okanogan County
48.1°F avg
Pacific County
50.5°F avg
Pend Oreille County
46.1°F avg
Pierce County
48.3°F avg
San Juan County
50.8°F avg
Skagit County
51.2°F avg
Skamania County
50.6°F avg
Snohomish County
50.6°F avg
Spokane County
47.0°F avg
Stevens County
47.2°F avg
Thurston County
50.5°F avg
Wahkiakum County
52.0°F avg
Walla Walla County
53.3°F avg
Whatcom County
50.0°F avg
Whitman County
48.9°F avg
Yakima County
50.9°F avg
Data sources: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020. Forecast and alert data from National Weather Service API. Air quality data from Open-Meteo.
Climate normals are 30-year averages of weather variables. Station data is aggregated to county level. Forecasts and alerts are fetched live and may change frequently. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.