McLean County Climate
McLean County, Kentucky
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
57.2°F
Annual Precip
45.6"
Annual Snowfall
4.3"
Extreme Heat Days
34
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
7a
Minimum winter temperature range for plant survival
4,293
Excellent for heat-loving crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: McLean County
Climate Verdict
McLean County has a mild, with an average annual temperature of 57.2°F, moderately wet with 45.6 inches of annual precipitation, occasional hot days — 34.2 per year above 90°F, light snow averaging 4.3 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 34.3°F. summers are warm — July averages 77.5°F. The 43°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
The moderate temperatures support hiking, cycling, and camping comfortably in spring, summer, and fall.
Regional Context
McLean County closely matches the Kentucky statewide average temperature of 56.0°F, it is somewhat drier than average for Kentucky.
Climate Profile
About McLean County Weather
A Warm Central Basin Climate
McLean County's 57.2°F annual average is warmer than the national median. It is drier than many of its neighbors, receiving 45.6 inches of precipitation annually.
Slightly Warmer than the Kentucky Average
The county stays one degree warmer than the Kentucky state average of 56.2°F. It is also one of the drier counties in the state, falling five inches below the state precipitation mean.
The Drier Choice in the Region
McLean is notably drier than Meade and Marion counties to the east. It shares the characteristic heat of western Kentucky but with less annual snowfall than central regions.
Hot Summers and Very Little Snow
July heat averages 77.5°F with 34 days exceeding 90°F. Winters are manageable with a 34.3°F January average and only 4.3 inches of annual snow.
Low Snow Means Easy Winters
Minimal snowfall of just over 4 inches makes winter travel easier than in eastern Kentucky. Focus on efficient cooling for the month-long stretch of 90-degree summer days.
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.