Climate change in Orange County, California
Since 1979, Orange County, California has warmed 2.0°F, with 16 more days above 90°F, 6 more nights above 70°F and 26% less precipitation a year.
- Average temperature: +2.0°F
- Summer highs (Jun–Aug): +1.5°F
- Winter lows (Dec–Feb): +2.4°F
- Precipitation: −26%
- Wettest day of the year: −33%
- Longest dry spell: +0 days
- Days above 90°F: +16 days
- Nights above 70°F: +6 days
- Freezing nights: −0 days
- Frost-free season: +1 days
- Muggy days: +2 days
- Summer heat index (Jun–Aug): +2.0°F
- Extreme fire-weather days: +20 days
Changes follow the trend line through every year from 1979 to 2025. Data: NOAA nClimGrid-Daily; humidity from gridMET, adjusted to airport observations.