Climate change in Washington County, Ohio
Since 1979, Washington County, Ohio has warmed 3.0°F, with 5 more days above 90°F, 4 more nights above 70°F and 9% more precipitation a year. Its climate in 1996–2025 is most like Kanawha County, WV's was in 1951–1980.
- Average temperature: +3.0°F
- Summer highs (Jun–Aug): +1.4°F
- Winter lows (Dec–Feb): +4.6°F
- Precipitation: +9%
- Wettest day of the year: +9%
- Longest dry spell: −2 days
- Days above 90°F: +5 days
- Nights above 70°F: +4 days
- Freezing nights: −18 days
- Frost-free season: +17 days
- Muggy days: +5 days
- Summer heat index (Jun–Aug): +1.9°F
- Extreme fire-weather days: +18 days
Changes follow the trend line through every year from 1979 to 2025. Data: NOAA nClimGrid-Daily; humidity from gridMET, adjusted to airport observations.