Mercer County Climate
Mercer County, West Virginia
Avg Annual Temp
51.9°F
Annual Precip
42.5"
Annual Snowfall
32.7"
Extreme Heat Days
2.9000000000000004
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Mercer County Weather
Cool Highlands and Above Average Snow
Mercer County's 51.9°F average temperature is cooler than the national median. It experiences a relatively dry climate for the east, with 42.6 inches of annual precipitation.
Among the State's Coolest Counties
The county stays nearly a full degree cooler than the West Virginia state average of 52.8°F. It is also drier than the state benchmark, falling 4.4 inches below the average precipitation of 47.0 inches.
The Snow Capital of the Southern Region
Mercer records 32.7 inches of snow annually, far exceeding the totals in nearby Logan or Lincoln. It is also much cooler in summer, seeing only 3 days of extreme heat per year.
Mild Summers and Snowy Winter Months
July is very moderate with a 70.6°F average and almost no days over 90°F. Winter is the main event, featuring 32.7 inches of snowfall and an average seasonal temperature of 33.9°F.
Winter Preparedness is the Top Priority
Heavy-duty snow removal equipment and winter tires are essential for the 32.7 inches of annual snow. Air conditioning is rarely needed as the county averages only 3 days of extreme heat.
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.