Mason County Climate
Mason County, West Virginia
Avg Annual Temp
53.0°F
Annual Precip
44.2"
Annual Snowfall
—
Extreme Heat Days
21.3
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Mason County Weather
Average National Temperatures and Lower Rainfall
Mason County's 53.0°F annual average aligns perfectly with the national median for temperate zones. It is drier than many eastern counties, receiving 44.2 inches of annual precipitation.
A Drier Pocket in the Mountain State
Mason is slightly warmer than the state average of 52.8°F but receives significantly less rain. Its 44.2 inches of precipitation is nearly 3 inches below the West Virginia state average of 47.0 inches.
Moderate Extremes Along the Ohio River
The county sees 21 days of extreme heat, roughly half of what is experienced in Logan County to the south. This makes Mason a more moderate choice for those avoiding intense Appalachian summer heat.
Cold Mid-Winters and Balanced Summers
July temperatures average 73.9°F, while January cools down to a 30.8°F mean. While snowfall data is not recorded, the county experiences 21 days where temperatures exceed 90°F.
Protect Pipes and Plan Outdoor Activities
The 30.8°F January average requires winterizing outdoor plumbing to prevent freezing. With 44.2 inches of rain, this is one of the better West Virginia counties for planning consistent outdoor recreation.
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.