Peoria County Climate
Peoria County, Illinois
Avg Annual Temp
51.8°F
Annual Precip
38.1"
Annual Snowfall
22.2"
Extreme Heat Days
22.95
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Peoria County Weather
Standard Heartland Weather Patterns
Peoria County’s 51.8°F average annual temperature is typical for the Midwest. It receives 38.1 inches of precipitation, which is slightly drier than the national average for humid continental zones.
Cooler and Drier Than the State
Peoria is one degree cooler than the Illinois state average of 52.8°F. Its 38.1 inches of precipitation also falls below the state average of 41.7 inches.
The Snow Capital of the Region
Peoria receives a significant 22.2 inches of snow annually, which is much higher than Moultrie’s 14 inches. It balances this with 23 days of extreme heat, reflecting a highly variable climate.
Vivid Seasons and Significant Snow
Winters feature a January average of 24.6°F and 22.2 inches of snow. Summers are warm and humid, with 23 days per year hitting or exceeding 90°F.
Invest in Robust Snow Equipment
The 22.2 inches of annual snowfall requires a reliable snow blower or professional removal service. Homeowners should also check their cooling systems ahead of the 23 extreme heat days.
Frequently Asked Questions
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Track your own weather in Peoria County
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Data source: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020.
Climate normals are 30-year averages of weather variables computed from 1991 to 2020. Station data is aggregated to county level using spatial averaging. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.