Climate change in Thurston County, Washington
Since 1979, Thurston County, Washington has warmed 0.9°F, with 4 more days above 90°F, about the same number of nights above 70°F and 2% less precipitation a year.
- Average temperature: +0.9°F
- Summer highs (Jun–Aug): +3.1°F
- Winter lows (Dec–Feb): +0.7°F
- Precipitation: −2%
- Wettest day of the year: +6%
- Longest dry spell: +10 days
- Days above 90°F: +4 days
- Nights above 70°F: +0 days
- Freezing nights: +0 days
- Frost-free season: +7 days
- Muggy days: +0 days
- Summer heat index (Jun–Aug): +3.1°F
- Extreme fire-weather days: +24 days
Changes follow the trend line through every year from 1979 to 2025. Data: NOAA nClimGrid-Daily; humidity from gridMET, adjusted to airport observations.