Thurston County Climate
Thurston County, Washington
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
50.5°F
Annual Precip
50.6"
Annual Snowfall
3.9"
Extreme Heat Days
6
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
8b
Minimum winter temperature range for plant survival
1,723
Favors cool-season crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Thurston County
Climate Verdict
Thurston County has a mild, with an average annual temperature of 50.5°F, moderately wet with 50.6 inches of annual precipitation, rare extreme heat with only 6.4 days above 90°F annually, light snow averaging 3.9 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 39.6°F. summers are pleasantly cool with July averaging 64.2°F. The climate is remarkably stable year-round, with only a 25°F difference between January and July. December is typically the coldest month and July the warmest.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Thurston County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Thurston County closely matches the Washington statewide average temperature of 49.9°F, it is also noticeably wetter, receiving 12.1 inches more precipitation than the state average.
Climate Profile
About Thurston County Weather
Thurston’s Mild Marine West Coast Climate
Thurston County averages 50.5°F annually, placing it closer to the national median than its northern neighbors. The climate is typical of the Pacific Northwest, characterized by mild temperatures and high moisture.
Slightly Warmer than the Washington Average
At 50.5°F, the county is slightly warmer than the state average of 49.9°F. This reflects the moderating influence of the Puget Sound on local weather patterns.
Wetter but Milder than Eastern Counties
The county receives 50.6 inches of precipitation annually, more than double the amount seen in Stevens County. Conversely, it sees only 3.9 inches of snow, keeping winters much more manageable.
Consistent Rain and Low Extreme Heat
Extreme heat is rare here, with only 6 days reaching 90°F or higher each year. Summers are mild at 62.5°F, while winters remain relatively warm with a December-February average of 39.7°F.
Gear Up for Consistent Rainfall
High-quality rain gear and home gutter maintenance are essential for managing the 50.6 inches of annual rain. While heavy snow is rare, residents should prepare for damp, overcast winters.
Frequently Asked Questions
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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.