Climate change in Boone County, Indiana
Since 1979, Boone County, Indiana has warmed 2.7°F, with 3 fewer days above 90°F, 1 more nights above 70°F and 1% less precipitation a year. Its climate in 1996–2025 is most like Franklin County, IN's was in 1951–1980.
- Average temperature: +2.7°F
- Summer highs (Jun–Aug): +0.1°F
- Winter lows (Dec–Feb): +4.1°F
- Precipitation: −1%
- Wettest day of the year: +10%
- Longest dry spell: −1 days
- Days above 90°F: −3 days
- Nights above 70°F: +1 days
- Freezing nights: −16 days
- Frost-free season: +19 days
- Muggy days: +3 days
- Summer heat index (Jun–Aug): +0.6°F
- Extreme fire-weather days: +17 days
- Snowfall: −29%
- 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.