Climate change in Johnson County, Indiana
Since 1979, Johnson County, Indiana has warmed 2.6°F, with about the same number of days above 90°F, 1 more nights above 70°F and 10% more precipitation a year. Its climate in 1996–2025 is most like Grant County, KY's was in 1951–1980.
- Average temperature: +2.6°F
- Summer highs (Jun–Aug): +0.4°F
- Winter lows (Dec–Feb): +4.6°F
- Precipitation: +10%
- Wettest day of the year: +24%
- Longest dry spell: +1 days
- Days above 90°F: +0 days
- Nights above 70°F: +1 days
- Freezing nights: −17 days
- Frost-free season: +18 days
- Muggy days: +1 days
- Summer heat index (Jun–Aug): +0.7°F
- Extreme fire-weather days: +18 days
- Snowfall: −16%
- 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.