Fairfield County Climate
Fairfield County, Ohio
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
52.7°F
Annual Precip
40.2"
Annual Snowfall
—
Extreme Heat Days
19
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
6a
Minimum winter temperature range for plant survival
3,385
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Fairfield County
Climate Verdict
Fairfield County has a mild, with an average annual temperature of 52.7°F, moderately wet with 40.2 inches of annual precipitation, rare extreme heat with only 18.7 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 29.3°F. summers are warm — July averages 74.1°F. The 45°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Fairfield County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Fairfield County closely matches the Ohio statewide average temperature of 51.5°F.
Climate Profile
About Fairfield County Weather
Warm and moist temperate climate
Fairfield County's 52.7°F average annual temperature is slightly warmer than the national median. It experiences a moist continental climate with consistent rainfall throughout the year.
One of Ohio's warmer regions
The county stays warmer than the Ohio state average of 51.5°F, recording a 52.7°F mean temperature. It benefits from its central-southern positioning within the state.
Similar to the capital region
Fairfield's climate closely tracks neighbor Franklin County, though it is slightly cooler than Franklin's 53.2°F. It receives 40.2 inches of precipitation, very close to the state average of 41.2 inches.
Significant heat and mild winters
Summers are intense with 19 extreme heat days over 90°F and a summer average of 72.5°F. Winters are relatively mild for Ohio, averaging 31.9°F during the coldest months.
Budget for summer cooling costs
With 19 days of extreme heat, air conditioning is a necessity for local residents. While specific snowfall data is limited, the 29.3°F January average suggests a need for reliable winter weatherization.
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.