Climate change in White County, Illinois
Since 1979, White County, Illinois has warmed 2.7°F, with 1 fewer days above 90°F, 7 more nights above 70°F and 4% more precipitation a year. Its climate in 1996–2025 is most like Ballard County, KY's was in 1951–1980.
- Average temperature: +2.7°F
- Summer highs (Jun–Aug): +0.0°F
- Winter lows (Dec–Feb): +4.1°F
- Precipitation: +4%
- Wettest day of the year: +18%
- Longest dry spell: +2 days
- Days above 90°F: −1 days
- Nights above 70°F: +7 days
- Freezing nights: −17 days
- Frost-free season: +15 days
- Muggy days: +10 days
- Summer heat index (Jun–Aug): +0.3°F
- Extreme fire-weather days: +8 days
Changes follow the trend line through every year from 1979 to 2025. Data: NOAA nClimGrid-Daily; humidity from gridMET, adjusted to airport observations.