Wayne County Climate
Wayne County, Illinois
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
57.1°F
Annual Precip
46.5"
Annual Snowfall
11.9"
Extreme Heat Days
44
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
6b
Minimum winter temperature range for plant survival
4,412
Excellent for heat-loving crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Wayne County
Climate Verdict
Wayne County has a mild, with an average annual temperature of 57.1°F, moderately wet with 46.5 inches of annual precipitation, occasional hot days — 44.2 per year above 90°F, light snow averaging 11.9 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 32.8°F. summers are warm — July averages 78.7°F. The 46°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
The moderate temperatures support hiking, cycling, and camping comfortably in spring, summer, and fall.
Regional Context
Wayne County is 4.3°F warmer than the Illinois statewide average of 52.8°F, it is somewhat wetter than average for Illinois, the county experiences 16.938967803030305 more extreme heat days than the state average.
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 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.