Climate change in Guthrie County, Iowa
Since 1979, Guthrie County, Iowa has warmed 1.8°F, with 5 fewer days above 90°F, about the same number of nights above 70°F and 5% more precipitation a year. Its climate in 1996–2025 is most like Washington County, IA's was in 1951–1980.
- Average temperature: +1.8°F
- Summer highs (Jun–Aug): +0.1°F
- Winter lows (Dec–Feb): +2.8°F
- Precipitation: +5%
- Wettest day of the year: −10%
- Longest dry spell: +3 days
- Days above 90°F: −5 days
- Nights above 70°F: +0 days
- Freezing nights: −10 days
- Frost-free season: +13 days
- Muggy days: +9 days
- Summer heat index (Jun–Aug): +0.4°F
- Extreme fire-weather days: +7 days
Changes follow the trend line through every year from 1979 to 2025. Data: NOAA nClimGrid-Daily; humidity from gridMET, adjusted to airport observations.