Climate change in Riverside County, California
Since 1979, Riverside County, California has warmed 2.7°F, with 17 more days above 90°F, 26 more nights above 70°F and 36% less precipitation a year.
- Average temperature: +2.7°F
- Summer highs (Jun–Aug): +3.3°F
- Winter lows (Dec–Feb): +1.5°F
- Precipitation: −36%
- Wettest day of the year: −24%
- Longest dry spell: +37 days
- Days above 90°F: +17 days
- Nights above 70°F: +26 days
- Freezing nights: −2 days
- Frost-free season: +14 days
- Muggy days: −0 days
- Summer heat index (Jun–Aug): +2.8°F
- Extreme fire-weather days: +25 days
Changes follow the trend line through every year from 1979 to 2025. Data: NOAA nClimGrid-Daily; humidity from gridMET, adjusted to airport observations.