Climate change in Marin County, California
Since 1979, Marin County, California has warmed 1.6°F, with 2 more days above 90°F, about the same number of nights above 70°F and 20% less precipitation a year. Its climate in 1996–2025 is most like San Francisco County, CA's was in 1951–1980.
- Average temperature: +1.6°F
- Summer highs (Jun–Aug): +1.6°F
- Winter lows (Dec–Feb): +1.6°F
- Precipitation: −20%
- Wettest day of the year: −24%
- Longest dry spell: +13 days
- Days above 90°F: +2 days
- Nights above 70°F: +0 days
- Freezing nights: −1 days
- Frost-free season: +7 days
- Muggy days: +0 days
- Summer heat index (Jun–Aug): +1.9°F
- Extreme fire-weather days: +9 days
Changes follow the trend line through every year from 1979 to 2025. Data: NOAA nClimGrid-Daily; humidity from gridMET, adjusted to airport observations.