Coles County Climate
Coles County, Illinois
Avg Annual Temp
54.0°F
Annual Precip
40.3"
Annual Snowfall
16.8"
Extreme Heat Days
25.366666666666664
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Coles County Weather
Perfectly aligned with national temperature medians
Coles County averages 54.0°F annually, aligning perfectly with the national median for temperature. Its 40.3 inches of precipitation is slightly lower than the surrounding Illinois average but typical for the Midwest.
Warmer than the average Illinois county
The county stays warmer than the Illinois average of 52.8°F by over a degree. This places it firmly in the transition zone between the cooler northern plains and the warmer southern tip of the state.
Warmer summers and less snow than Champaign
Coles is warmer than Champaign County to the north, experiencing 25 extreme heat days compared to Champaign's 21. It also sees less snow, averaging 16.8 inches compared to its neighbor's 20.9 inches.
Reliable seasonal shifts with moderate extremes
Summers are warm with 25 days reaching 90°F and a July average of 76.4°F. January averages 28.2°F, providing a clear but not overly harsh winter season with moderate snowfall.
Maintain a balanced year-round climate plan
A mix of summer and winter gear is needed to handle the 25 heat days and nearly 17 inches of snow. Homeowners should plan for a balanced utility budget to cover both heating and cooling seasons.
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.