Jefferson County Climate
Jefferson County, Ohio
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
51.4°F
Annual Precip
42.4"
Annual Snowfall
—
Extreme Heat Days
11
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
6b
Minimum winter temperature range for plant survival
3,116
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Jefferson County
Climate Verdict
Jefferson County has a mild, with an average annual temperature of 51.4°F, moderately wet with 42.4 inches of annual precipitation, rare extreme heat with only 10.65 days above 90°F annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 28.4°F. summers are warm — July averages 73.1°F. The 45°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Jefferson County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Jefferson County closely matches the Ohio statewide average temperature of 51.5°F.
Climate Profile
About Jefferson County Weather
Appalachian Plateau Weather Patterns
Jefferson County averages 51.4°F, which is typical for the humid continental climate of the Appalachian Plateau. It offers a balanced mix of warm summers and cold, snowy winters.
Matching the State Temperature Profile
Jefferson County's 51.4°F average temperature almost perfectly matches the Ohio state average. Its 42.4 inches of annual precipitation is also very close to the 41.2-inch statewide norm.
Comparable Heat to Jackson County
Jefferson and Jackson counties both experience 11 days of extreme heat above 90°F annually. However, Jefferson's 73.1°F July average makes for slightly warmer summer peaks than Jackson.
Consistent Heat and Cold Swings
January temperatures average 28.4°F, while July heats up to an average of 73.1°F. While specific annual snowfall totals are currently unavailable, neighboring counties suggest a significant winter presence.
Plan for High Summer Humidity
The 11 days of extreme heat require efficient air conditioning for indoor comfort. Residents should also monitor local precipitation closely, as the county receives 42.4 inches of rain annually.
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.