Climate change in Peoria County, Illinois
Since 1979, Peoria County, Illinois has warmed 3.1°F, with 2 more days above 90°F, 7 more nights above 70°F and about the same precipitation a year. Its climate in 1996–2025 is most like Christian County, IL's was in 1951–1980.
- Average temperature: +3.1°F
- Summer highs (Jun–Aug): +0.9°F
- Winter lows (Dec–Feb): +4.2°F
- Precipitation: −0%
- Wettest day of the year: −0%
- Longest dry spell: −5 days
- Days above 90°F: +2 days
- Nights above 70°F: +7 days
- Freezing nights: −20 days
- Frost-free season: +14 days
- Muggy days: +1 days
- Summer heat index (Jun–Aug): +1.2°F
- Extreme fire-weather days: +14 days
- Snowfall: +22%
- Snowy days (1 inch or more): +1 days
Changes follow the trend line through every year from 1979 to 2025. Data: NOAA nClimGrid-Daily; humidity from gridMET, adjusted to airport observations.