Chatham County Climate
Chatham County, Georgia
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
67.4°F
Annual Precip
48.1"
Annual Snowfall
0.0"
Extreme Heat Days
81
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
9a
Minimum winter temperature range for plant survival
6,657
Excellent for heat-loving crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Chatham County
Climate Verdict
Chatham County has a warm, averaging 67.4°F year-round, moderately wet with 48.1 inches of annual precipitation, significant summer heat with 80.5 days annually above 90°F, virtually no measurable snowfall. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are mild, with January temperatures averaging 50.7°F. summers are hot, with July averaging 83.0°F. The 32°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Summer outdoor activities should be planned for early morning or evening to avoid extreme heat.
Regional Context
Chatham County is 3.7°F warmer than the Georgia statewide average of 63.7°F, it is somewhat drier than average for Georgia, the county experiences 15.520054200541992 more extreme heat days than the state average.
Climate Profile
About Chatham County Weather
Chatham's Coastal Climate Profile
Chatham County averages 67.4°F annually, standing well above the national median of 55°F. Its coastal location influences a humid subtropical environment that rarely sees extreme cold.
Warmer Than the State Average
The county's average temperature of 67.4°F is nearly 4 degrees higher than the Georgia state average of 63.7°F. However, it receives 48.1 inches of rain, which is slightly less than the state average of 51.4 inches.
Comparing Coastal and Inland Heat
Chatham is cooler than its southern neighbor Charlton County, which averages 69.8°F. While Charlton deals with 109 extreme heat days, Chatham residents face a still-significant 81 days of 90°F or higher.
Hot Summers and Snowless Winters
Chatham experiences an average summer temperature of 81.7°F and records zero annual snowfall. Winters are quite mild, with the December to February average sitting at 52.6°F.
Preparing for Coastal Humidity
The 81 days of extreme heat require residents to have reliable air conditioning and proper hydration. Since the county receives 48.1 inches of rain but stays warm, mold prevention is a critical home maintenance task.
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.