Climate change in Delaware County, Indiana
Since 1979, Delaware County, Indiana has warmed 3.1°F, with 1 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 Warren County, OH's was in 1951–1980.
- Average temperature: +3.1°F
- Summer highs (Jun–Aug): +0.9°F
- Winter lows (Dec–Feb): +5.2°F
- Precipitation: +4%
- Wettest day of the year: +19%
- Longest dry spell: −1 days
- Days above 90°F: +1 days
- Nights above 70°F: +2 days
- Freezing nights: −19 days
- Frost-free season: +13 days
- Muggy days: +3 days
- Summer heat index (Jun–Aug): +0.8°F
- Extreme fire-weather days: +26 days
- Snowfall: −22%
- Snowy days (1 inch or more): −4 days
Changes follow the trend line through every year from 1979 to 2025. Data: NOAA nClimGrid-Daily; humidity from gridMET, adjusted to airport observations.