Marion County Climate
Marion County, Ohio
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
50.7°F
Annual Precip
38.8"
Annual Snowfall
25.1"
Extreme Heat Days
13
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
6a
Minimum winter temperature range for plant survival
3,106
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Marion County
Climate Verdict
Marion County has a mild, with an average annual temperature of 50.7°F, moderate rainfall of 38.8 inches per year, rare extreme heat with only 12.600000000000001 days above 90°F annually, moderate snowfall of 25.1 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 26.3°F. summers are warm — July averages 73.0°F. The 47°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Marion County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Marion County closely matches the Ohio statewide average temperature of 51.5°F, it is somewhat drier than average for Ohio.
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 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.