Climate change in Humboldt County, Iowa
Since 1979, Humboldt County, Iowa has warmed 1.8°F, with 7 fewer days above 90°F, 1 fewer nights above 70°F and 4% less precipitation a year. Its climate in 1996–2025 is most like Poweshiek County, IA's was in 1951–1980.
- Average temperature: +1.8°F
- Summer highs (Jun–Aug): −0.4°F
- Winter lows (Dec–Feb): +3.0°F
- Precipitation: −4%
- Wettest day of the year: −21%
- Longest dry spell: +1 days
- Days above 90°F: −7 days
- Nights above 70°F: −1 days
- Freezing nights: −12 days
- Frost-free season: +16 days
- Muggy days: +7 days
- Summer heat index (Jun–Aug): −0.4°F
- Extreme fire-weather days: +17 days
- Snowfall: +13%
- Snowy days (1 inch or more): −3 days
Changes follow the trend line through every year from 1979 to 2025. Data: NOAA nClimGrid-Daily; humidity from gridMET, adjusted to airport observations.