Edgar County Climate
Edgar County, Illinois
Avg Annual Temp
51.4°F
Annual Precip
42.7"
Annual Snowfall
19.1"
Extreme Heat Days
19.3
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Edgar County Weather
Temperate Climate with Consistent Rain
Edgar County maintains an average temperature of 51.4°F and receives 42.7 inches of precipitation. This creates a standard temperate climate profile common in the American Midwest.
Typical Temperatures and High Rainfall
The average temperature of 51.4°F is slightly cooler than the state average of 52.8°F. However, its 42.7 inches of rain makes it wetter than the typical Illinois county.
The Eastern Illinois Border Climate
Edgar County shares weather patterns with its Indiana neighbors to the east. It experiences more rainfall than western Illinois counties, supporting its robust agriculture.
Steady Warmth and Moderate Snow
The county sees 19 days of extreme heat over 90°F during the 72.5°F average summer. Winter brings 19.1 inches of snow, providing a consistent but manageable seasonal cover.
Balanced Prep for Rain and Heat
With 42.7 inches of annual precipitation, effective drainage is a priority for property owners. HVAC systems should be ready for the 19 days of heat and the 25.3°F January lows.
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.