Climate change in Summit County, Colorado
Since 1979, Summit County, Colorado has warmed 2.2°F, with about the same number of days above 90°F, about the same number of nights above 70°F and 2% less precipitation a year. Its climate in 1996–2025 is most like Clear Creek County, CO's was in 1951–1980.
- Average temperature: +2.2°F
- Summer highs (Jun–Aug): +2.7°F
- Winter lows (Dec–Feb): +2.1°F
- Precipitation: −2%
- Wettest day of the year: −5%
- Longest dry spell: −3 days
- Days above 90°F: +0 days
- Nights above 70°F: +0 days
- Freezing nights: −16 days
- Frost-free season: +23 days
- Muggy days: +0 days
- Summer heat index (Jun–Aug): +2.8°F
- Extreme fire-weather days: +17 days
- Snowfall: +13%
- Snowy days (1 inch or more): +2 days
Changes follow the trend line through every year from 1979 to 2025. Data: NOAA nClimGrid-Daily; humidity from gridMET, adjusted to airport observations.