DeKalb County Climate
DeKalb County, Georgia
Avg Annual Temp
61.5°F
Annual Precip
51.4"
Annual Snowfall
—
Extreme Heat Days
53.2
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About DeKalb County Weather
A Balanced Piedmont Climate
DeKalb County averages 61.5°F annually, which sits slightly above the national median but cooler than the deep South. It experiences a classic humid subtropical pattern with distinct seasonal shifts.
Cooler Than the State Median
At 61.5°F, DeKalb is cooler than the Georgia state average of 63.7°F. Its northern location and elevation provide a slight reprieve from the state's most intense heat.
Lower Temperatures Than Fayette
Compared to nearby Fayette County’s 63.2°F, DeKalb runs nearly two degrees cooler on average. It shares the same 51.4-inch precipitation average as the rest of the state.
Moderate Winters and Humid Summers
The county sees 53 extreme heat days per year where temperatures top 90°F. Winter brings a cool January average of 42.3°F, offering a true seasonal break.
Prepare for Rain and Humidity
With 51.4 inches of annual precipitation, residents need reliable rain gear and well-maintained gutters. Seasonal wardrobe swaps are necessary to handle both the 78°F summer and 44°F winter averages.
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.