Brown County Climate
Brown County, Ohio
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
51.6°F
Annual Precip
47.9"
Annual Snowfall
17.2"
Extreme Heat Days
21
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
6b
Minimum winter temperature range for plant survival
3,172
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Brown County
Climate Verdict
Brown County has a mild, with an average annual temperature of 51.6°F, moderately wet with 47.9 inches of annual precipitation, occasional hot days — 20.5 per year above 90°F, light snow averaging 17.2 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 28.3°F. summers are warm — July averages 73.1°F. The 45°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Brown County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Brown County closely matches the Ohio statewide average temperature of 51.5°F, it is also noticeably wetter, receiving 6.6 inches more precipitation than the state average.
Climate Profile
About Brown County Weather
Hot and Humid Southern Ohio
Brown County averages 51.6°F annually and receives a heavy 47.9 inches of precipitation. This combination creates a lush, humid environment that exceeds national rainfall medians.
One of Ohio's Warmest Spots
The county's 21 extreme heat days per year is one of the highest counts in Ohio. It is also significantly wetter than the state average of 41.2 inches.
Hotter Than Most Neighbors
With 21 days over 90°F, Brown County is much hotter in summer than Athens (11 days) or Ashtabula (6 days). It is also among the wettest counties in the southern region.
Intense Heat and High Rainfall
Summers are long with a 71.4°F average and frequent heat spikes. Winters remain damp with 17.2 inches of snow and a 30.9°F seasonal average.
Plan for High Cooling Costs
Residents must maintain robust HVAC systems to navigate the 21 extreme heat days. Basement waterproofing is also recommended to handle the nearly 48 inches of annual rain.
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.