Climate change in Seneca County, Ohio
Since 1979, Seneca County, Ohio has warmed 2.8°F, with about the same number of days above 90°F, 3 more nights above 70°F and 4% more precipitation a year. Its climate in 1996–2025 is most like Greene County, OH's was in 1951–1980.
- Average temperature: +2.8°F
- Summer highs (Jun–Aug): +1.4°F
- Winter lows (Dec–Feb): +4.3°F
- Precipitation: +4%
- Wettest day of the year: +19%
- Longest dry spell: −2 days
- Days above 90°F: −0 days
- Nights above 70°F: +3 days
- Freezing nights: −15 days
- Frost-free season: +14 days
- Muggy days: +1 days
- Summer heat index (Jun–Aug): +1.1°F
- Extreme fire-weather days: +16 days
- Snowfall: +29%
- 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.