Macon County Climate
Macon County, Illinois
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
53.0°F
Annual Precip
38.4"
Annual Snowfall
13.6"
Extreme Heat Days
27
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
6a
Minimum winter temperature range for plant survival
3,655
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Macon County
Climate Verdict
Macon County has a mild, with an average annual temperature of 53.0°F, moderate rainfall of 38.4 inches per year, occasional hot days — 26.55 per year above 90°F, light snow averaging 13.6 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 27.1°F. summers are warm — July averages 75.7°F. The 49°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Macon County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Macon County closely matches the Illinois statewide average temperature of 52.8°F, it is somewhat drier than average for Illinois.
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
What is the average temperature in Macon County?
How much rain does Macon County get?
Does it snow in Macon County?
How hot does Macon County get in summer?
How cold are winters in Macon County?
Track your own weather in Macon County
Ambient Weather personal weather stations give you hyperlocal climate data.
Sponsored
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.