Climate change in Harrison County, Ohio
Since 1979, Harrison County, Ohio has warmed 3.0°F, with 3 more days above 90°F, 2 more nights above 70°F and 4% more precipitation a year. Its climate in 1996–2025 is most like York County, PA's was in 1951–1980.
- Average temperature: +3.0°F
- Summer highs (Jun–Aug): +1.8°F
- Winter lows (Dec–Feb): +4.3°F
- Precipitation: +4%
- Wettest day of the year: +17%
- Longest dry spell: −1 days
- Days above 90°F: +3 days
- Nights above 70°F: +2 days
- Freezing nights: −15 days
- Frost-free season: +20 days
- Muggy days: +5 days
- Summer heat index (Jun–Aug): +2.4°F
- Extreme fire-weather days: +17 days
- Snowfall: −53%
- 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.