Macon County Climate
Macon County, Illinois
Avg Annual Temp
53.0°F
Annual Precip
38.4"
Annual Snowfall
13.6"
Extreme Heat Days
26.55
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Macon County Weather
Standard Midwestern Climate Trends
Macon County averages 53.0°F annually, aligning almost perfectly with the national median temperature. Its 38.4 inches of precipitation reflect a stable, humid continental environment.
Aligning with the State Baseline
Macon County is a perfect representative of state weather, as its 53.0°F average is nearly identical to the Illinois state average of 52.8°F. It avoids the climate extremes found at the state's northern and southern borders.
Milder Winters than Northern Peers
Macon County sees only 13.6 inches of snow annually, which is significantly less than the 20-30 inches common in northern Illinois. It is slightly drier than neighbors like Lawrence, with roughly six fewer inches of annual rainfall.
Steamy July and Light Snowfall
July brings an average temperature of 75.7°F and 27 days over 90°F, creating a humid summer peak. However, winters are relatively dry in terms of frozen precipitation, with only 13.6 inches of snow.
Focus on Summer Heat Mitigation
Energy costs here peak in the summer given the 27 extreme heat days and warm July average. While snow gear is necessary, the relatively low 13.6-inch total suggests winter maintenance is less intensive than in northern counties.
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.