Climate change in Delta County, Colorado
Since 1979, Delta County, Colorado has warmed 2.8°F, with 8 more days above 90°F, about the same number of nights above 70°F and 21% less precipitation a year. Its climate in 1996–2025 is most like Montezuma County, CO's was in 1951–1980.
- Average temperature: +2.8°F
- Summer highs (Jun–Aug): +3.8°F
- Winter lows (Dec–Feb): +2.4°F
- Precipitation: −21%
- Wettest day of the year: −11%
- Longest dry spell: +7 days
- Days above 90°F: +8 days
- Nights above 70°F: +0 days
- Freezing nights: −14 days
- Frost-free season: +16 days
- Muggy days: +0 days
- Summer heat index (Jun–Aug): +3.1°F
- Extreme fire-weather days: +33 days
Changes follow the trend line through every year from 1979 to 2025. Data: NOAA nClimGrid-Daily; humidity from gridMET, adjusted to airport observations.