Climate change in Mills County, Iowa
Since 1979, Mills County, Iowa has warmed 1.9°F, with 3 fewer days above 90°F, 1 fewer nights above 70°F and 7% less precipitation a year. Its climate in 1996–2025 is most like Richardson County, NE's was in 1951–1980.
- Average temperature: +1.9°F
- Summer highs (Jun–Aug): +0.5°F
- Winter lows (Dec–Feb): +2.1°F
- Precipitation: −7%
- Wettest day of the year: −22%
- Longest dry spell: +2 days
- Days above 90°F: −3 days
- Nights above 70°F: −1 days
- Freezing nights: −8 days
- Frost-free season: +17 days
- Muggy days: +10 days
- Summer heat index (Jun–Aug): +0.4°F
- Extreme fire-weather days: +13 days
- Snowfall: −17%
- 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.