Peoria County Climate
Peoria County, Illinois
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
51.8°F
Annual Precip
38.1"
Annual Snowfall
22.2"
Extreme Heat Days
23
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
6a
Minimum winter temperature range for plant survival
3,508
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Peoria County
Climate Verdict
Peoria County has a mild, with an average annual temperature of 51.8°F, moderate rainfall of 38.1 inches per year, occasional hot days — 22.95 per year above 90°F, moderate snowfall of 22.2 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 24.6°F. summers are warm — July averages 75.3°F. Residents experience a substantial 51°F difference between winter and summer.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Peoria County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Peoria County closely matches the Illinois statewide average temperature of 52.8°F, it is somewhat drier than average for Illinois.
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 sources: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020. Forecast and alert data from National Weather Service API. Air quality data from Open-Meteo.
Climate normals are 30-year averages of weather variables. Station data is aggregated to county level. Forecasts and alerts are fetched live and may change frequently. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.