Mason County Climate
Mason County, Kentucky
Avg Annual Temp
54.7°F
Annual Precip
48.3"
Annual Snowfall
—
Extreme Heat Days
26.1
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Mason County Weather
Cooler Midwestern Influence on the River
Mason County's 54.7°F annual average reflects its northern position along the Ohio River. This makes it slightly cooler than the national median temperature for mid-latitude counties.
Among Kentucky's Cooler Northern Counties
The county is significantly cooler than the Kentucky state average of 56.2°F. Its northern latitude leads to shorter summers and more pronounced winter chill.
Cooler and Drier than the South
Mason County is roughly four degrees cooler on average than western Marshall County. Its 48.3 inches of rain also falls below the state average of 50.6 inches.
Crisp Winters and Moderate Heat
January is cold with an average of 32.0°F, while July stays relatively mild at 75.9°F. The county sees only 26 extreme heat days, far fewer than the southern parts of the state.
Prepare for Freezing River Winds
Residents should prioritize winter weatherization given that average January temperatures hover at the freezing mark. Reliable heating and moisture control for the 48 inches of rain are essential for home maintenance.
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.