Fayette County Climate
Fayette County, Illinois
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
53.8°F
Annual Precip
42.5"
Annual Snowfall
12.8"
Extreme Heat Days
29
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
6b
Minimum winter temperature range for plant survival
3,760
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Fayette County
Climate Verdict
Fayette County has a mild, with an average annual temperature of 53.8°F, moderately wet with 42.5 inches of annual precipitation, occasional hot days — 28.966666666666665 per year above 90°F, light snow averaging 12.8 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 28.3°F. summers are warm — July averages 76.2°F. The 48°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Fayette County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Fayette County closely matches the Illinois statewide average temperature of 52.8°F.
Climate Profile
About Fayette County Weather
Fayette's Warm Humid Continental Climate
Fayette County averages 53.8°F annually, placing it slightly above the national median temperature. This typical humid continental climate experiences distinct seasonal shifts and moderate precipitation.
Warmer Than the State Average
The county's annual average temperature of 53.8°F is one degree higher than the Illinois state average of 52.8°F. It sits among the warmer tier of counties in the central part of the state.
Rainier Than Northern Neighbors
Fayette receives 42.5 inches of annual precipitation, which is slightly more than the 41.7-inch state average. This puts it in line with its southern neighbors while being wetter than counties further north.
A Month of Intense Summer Heat
Summers are hot with 29 extreme heat days reaching 90°F or more, while winters remain relatively mild with only 12.8 inches of snow. The January average of 28.3°F is significantly warmer than northern Illinois counties.
Prepare for Heat and Humidity
Residents should invest in high-efficiency cooling systems to handle the frequent 90°F days. While snowfall is moderate, keeping a basic winter kit is still necessary for the sub-freezing January nights.
Frequently Asked Questions
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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.