Climate change in Cass County, Iowa
Since 1979, Cass County, Iowa has warmed 2.0°F, with 5 fewer days above 90°F, about the same number of nights above 70°F and about the same precipitation a year. Its climate in 1996–2025 is most like Wayne County, IA's was in 1951–1980.
- Average temperature: +2.0°F
- Summer highs (Jun–Aug): +0.2°F
- Winter lows (Dec–Feb): +3.3°F
- Precipitation: −0%
- Wettest day of the year: −6%
- Longest dry spell: +1 days
- Days above 90°F: −5 days
- Nights above 70°F: −0 days
- Freezing nights: −13 days
- Frost-free season: +18 days
- Muggy days: +11 days
- Summer heat index (Jun–Aug): +0.2°F
- Extreme fire-weather days: +13 days
Changes follow the trend line through every year from 1979 to 2025. Data: NOAA nClimGrid-Daily; humidity from gridMET, adjusted to airport observations.