Climate change in Hardin County, Ohio
Since 1979, Hardin County, Ohio has warmed 3.3°F, with 1 fewer days above 90°F, 5 more nights above 70°F and 3% more precipitation a year. Its climate in 1996–2025 is most like Montgomery County, OH's was in 1951–1980.
- Average temperature: +3.3°F
- Summer highs (Jun–Aug): +1.2°F
- Winter lows (Dec–Feb): +4.7°F
- Precipitation: +3%
- Wettest day of the year: −1%
- Longest dry spell: −2 days
- Days above 90°F: −1 days
- Nights above 70°F: +5 days
- Freezing nights: −23 days
- Frost-free season: +33 days
- Muggy days: +3 days
- Summer heat index (Jun–Aug): +1.2°F
- Extreme fire-weather days: +18 days
- Snowfall: −7%
- Snowy days (1 inch or more): −0 days
Changes follow the trend line through every year from 1979 to 2025. Data: NOAA nClimGrid-Daily; humidity from gridMET, adjusted to airport observations.