Mercer County Climate
Mercer County, West Virginia
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
51.9°F
Annual Precip
42.6"
Annual Snowfall
32.7"
Extreme Heat Days
3
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
7a
Minimum winter temperature range for plant survival
2,935
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Mercer County
Climate Verdict
Mercer County has a mild, with an average annual temperature of 51.9°F, moderately wet with 42.6 inches of annual precipitation, rare extreme heat with only 2.9000000000000004 days above 90°F annually, moderate snowfall of 32.7 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 31.8°F. summers are warm — July averages 70.6°F. The 39°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Mercer County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Mercer County closely matches the West Virginia statewide average temperature of 52.8°F, it is somewhat drier than average for West Virginia.
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 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.