Franklin County Climate
Franklin County, Ohio
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
53.2°F
Annual Precip
41.3"
Annual Snowfall
23.6"
Extreme Heat Days
19
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
6b
Minimum winter temperature range for plant survival
3,551
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Franklin County
Climate Verdict
Franklin County has a mild, with an average annual temperature of 53.2°F, moderately wet with 41.3 inches of annual precipitation, rare extreme heat with only 18.75 days above 90°F annually, moderate snowfall of 23.6 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 29.2°F. summers are warm — July averages 75.1°F. The 46°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Franklin County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Franklin County closely matches the Ohio statewide average temperature of 51.5°F.
Climate Profile
About Franklin County Weather
A warm central Ohio climate
Franklin County averages 53.2°F annually, making it warmer than the national median and many surrounding regions. It features a humid continental climate with a notable urban heat island effect.
Among the state's warmest counties
At 53.2°F, Franklin County is significantly warmer than the Ohio state average of 51.5°F. It frequently records some of the highest temperatures in the central part of the state.
Leading the region in heat
Franklin is warmer than neighboring Fairfield County, which averages 52.7°F. Its 41.3 inches of annual precipitation perfectly mirrors the Ohio state average of 41.2 inches.
Frequent heat and moderate snow
Summers are hot with 19 extreme heat days above 90°F and a July average of 75.1°F. Winters bring 23.6 inches of snow, which is modest compared to the state's northern reaches.
Invest in high-efficiency cooling
With 19 days of extreme heat per year, residents should prioritize air conditioning and energy-efficient windows. Winter gear is still necessary for the 29.2°F January lows and 23.6 inches of snow.
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.