Marion County Climate
Marion County, Ohio
Avg Annual Temp
50.7°F
Annual Precip
38.8"
Annual Snowfall
25.1"
Extreme Heat Days
12.6
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Marion County Weather
Chilly Midwestern Continental Climate
Marion County averages 50.7°F annually, staying below the national median temperature. It features a true four-season climate with a pronounced winter chill.
Cooler Than the State Mean
With an average of 50.7°F, Marion County is cooler than the 51.5°F Ohio state average. It shares this cooler profile with other central-north agricultural counties.
Less Rain, More Snow
Marion receives 38.8 inches of annual precipitation, which is drier than the state average. However, it gets more snow (25.1 inches) than nearby Madison County (20.4 inches).
Cold Winters and Fair Summers
Winters average a cold 28.9°F with 25.1 inches of snowfall. Summer heat is manageable, with 13 days reaching 90°F and a July average of 73.0°F.
Invest in Snow Equipment
A reliable snow shovel or blower is necessary to handle the 25.1 inches of annual snow. The lower rainfall of 38.8 inches makes this a slightly drier environment for local gardening.
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.