Fayette County Climate
Fayette County, Illinois
Avg Annual Temp
53.8°F
Annual Precip
42.5"
Annual Snowfall
12.8"
Extreme Heat Days
28.966666666666665
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
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 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.