Climate change in Yuma County, Arizona
Since 1979, Yuma County, Arizona has warmed 2.6°F, with 20 more days above 90°F, 23 more nights above 70°F and 24% less precipitation a year. Its climate in 1996–2025 is most like Imperial County, CA's was in 1951–1980.
- Average temperature: +2.6°F
- Summer highs (Jun–Aug): +4.4°F
- Winter lows (Dec–Feb): +0.4°F
- Precipitation: −24%
- Wettest day of the year: +6%
- Longest dry spell: +25 days
- Days above 90°F: +20 days
- Nights above 70°F: +23 days
- Freezing nights: −1 days
- Frost-free season: +5 days
- Muggy days: −4 days
- Summer heat index (Jun–Aug): +4.0°F
- Extreme fire-weather days: +17 days
Changes follow the trend line through every year from 1979 to 2025. Data: NOAA nClimGrid-Daily; humidity from gridMET, adjusted to airport observations.