McLean County Climate
McLean County, Kentucky
Avg Annual Temp
57.2°F
Annual Precip
45.6"
Annual Snowfall
4.3"
Extreme Heat Days
34.2
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
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 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.