Wayne County Climate
Wayne County, Illinois
Avg Annual Temp
57.1°F
Annual Precip
46.5"
Annual Snowfall
11.9"
Extreme Heat Days
44.2
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Wayne County Weather
A warm, high-precipitation climate
Wayne County stands out with an average temperature of 57.1°F, well above the national median. It is also quite wet, receiving 46.5 inches of precipitation annually.
Among the state's warmest counties
With an average of 57.1°F, Wayne County is much warmer than the Illinois average of 52.8°F. It ranks as one of the hottest counties in the state, particularly during the summer months.
Intense heat compared to neighbors
Wayne's 44 days of extreme heat nearly match Wabash County's 46 days, marking this region as the state's hot zone. It receives much more rain and less snow than northern counties like Will.
Sultry summers and mild winters
Summer averages a hot 77.2°F, while July peaks at 78.7°F with frequent 90-degree days. Winters are some of the state's mildest, averaging 35.6°F with only 11.9 inches of snow.
Prioritize cooling and rain gear
Residents should invest in high-efficiency cooling to manage the 44 days of extreme heat. Additionally, waterproof gear is essential for the heavy 46.5 inches of annual rainfall.
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.