Climate change in Placer County, California
Since 1979, Placer County, California has warmed 2.2°F, with 14 more days above 90°F, about the same number of nights above 70°F and 12% less precipitation a year. Its climate in 1996–2025 is most like Shasta County, CA's was in 1951–1980.
- Average temperature: +2.2°F
- Summer highs (Jun–Aug): +4.1°F
- Winter lows (Dec–Feb): +1.3°F
- Precipitation: −12%
- Wettest day of the year: −6%
- Longest dry spell: +32 days
- Days above 90°F: +14 days
- Nights above 70°F: +0 days
- Freezing nights: −10 days
- Frost-free season: +7 days
- Muggy days: +0 days
- Summer heat index (Jun–Aug): +3.3°F
- Extreme fire-weather days: +31 days
- Snowfall: −15%
- Snowy days (1 inch or more): −13 days
Changes follow the trend line through every year from 1979 to 2025. Data: NOAA nClimGrid-Daily; humidity from gridMET, adjusted to airport observations.