Logan County Climate
Logan County, Illinois
Avg Annual Temp
52.2°F
Annual Precip
39.3"
Annual Snowfall
19.0"
Extreme Heat Days
24.2
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Logan County Weather
Balanced Inland Climate Profile
Logan County's 52.2°F annual average temperature sits near the national median for temperate zones. With 39.3 inches of annual precipitation, the county maintains a consistent moisture level typical of the central United States.
Mirroring the Illinois Average
Logan County stays very close to the state norm, with its 52.2°F average nearly matching the Illinois average of 52.8°F. It serves as a climate midpoint between the colder north and the warmer southern tip of the state.
Central Illinois Climate Stability
Compared to nearby Livingston, Logan is slightly warmer and receives less snowfall, averaging 19.0 inches. Its rainfall is slightly below the state average of 41.7 inches, though still sufficient for its agricultural landscape.
Hot Summers with Moderate Snow
The county averages 24 extreme heat days above 90°F, concentrated during its 74.6°F July peak. Winters are cold but not extreme, featuring a 26.1°F average in January.
Reliable HVAC is a Priority
With two dozen days of extreme heat and 19 inches of snow, residents need both robust heating and cooling capacity. Planning for outdoor activities in July requires preparation for the 74.6°F average humidity and heat.
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.