Climate change in Ionia County, Michigan
Since 1979, Ionia County, Michigan has warmed 2.7°F, with 2 more days above 90°F, 1 more nights above 70°F and 6% more precipitation a year. Its climate in 1996–2025 is most like Van Buren County, MI's was in 1951–1980.
- Average temperature: +2.7°F
- Summer highs (Jun–Aug): +1.6°F
- Winter lows (Dec–Feb): +4.5°F
- Precipitation: +6%
- Wettest day of the year: −10%
- Longest dry spell: −2 days
- Days above 90°F: +2 days
- Nights above 70°F: +1 days
- Freezing nights: −13 days
- Frost-free season: +19 days
- Muggy days: +0 days
- Summer heat index (Jun–Aug): +1.7°F
- Extreme fire-weather days: +13 days
- Snowfall: +21%
- 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.