Climate change in San Luis Obispo County, California
Since 1979, San Luis Obispo County, California has warmed 2.6°F, with 30 more days above 90°F, about the same number of nights above 70°F and 14% less precipitation a year.
- Average temperature: +2.6°F
- Summer highs (Jun–Aug): +3.7°F
- Winter lows (Dec–Feb): +1.6°F
- Precipitation: −14%
- Wettest day of the year: +17%
- Longest dry spell: +26 days
- Days above 90°F: +30 days
- Nights above 70°F: +0 days
- Freezing nights: −4 days
- Frost-free season: −3 days
- Muggy days: +0 days
- Summer heat index (Jun–Aug): +3.3°F
- Extreme fire-weather days: +31 days
Changes follow the trend line through every year from 1979 to 2025. Data: NOAA nClimGrid-Daily; humidity from gridMET, adjusted to airport observations.