Jefferson County Climate
Jefferson County, Ohio
Avg Annual Temp
51.4°F
Annual Precip
42.4"
Annual Snowfall
—
Extreme Heat Days
10.65
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
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 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.