Logan County Climate
Logan County, Illinois
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
52.2°F
Annual Precip
39.3"
Annual Snowfall
19.0"
Extreme Heat Days
24
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
6a
Minimum winter temperature range for plant survival
3,495
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Logan County
Climate Verdict
Logan County has a mild, with an average annual temperature of 52.2°F, moderate rainfall of 39.3 inches per year, occasional hot days — 24.2 per year above 90°F, light snow averaging 19.0 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 26.1°F. summers are warm — July averages 74.6°F. The 48°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Logan County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Logan County closely matches the Illinois statewide average temperature of 52.8°F, it is somewhat drier than average for Illinois.
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 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.