Chatham County Climate
Chatham County, Georgia
Avg Annual Temp
67.4°F
Annual Precip
48.1"
Annual Snowfall
0.0"
Extreme Heat Days
80.5
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
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 source: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020.
Climate normals are 30-year averages of weather variables computed from 1991 to 2020. Station data is aggregated to county level using spatial averaging. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.