DeKalb County Climate
DeKalb County, Georgia
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
61.5°F
Annual Precip
51.4"
Annual Snowfall
—
Extreme Heat Days
53
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
8a
Minimum winter temperature range for plant survival
5,025
Excellent for heat-loving crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: DeKalb County
Climate Verdict
DeKalb County has a warm, averaging 61.5°F year-round, moderately wet with 51.4 inches of annual precipitation, occasional hot days — 53.2 per year above 90°F. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are mild, with January temperatures averaging 42.3°F. summers are warm — July averages 79.6°F. The 37°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
The moderate temperatures support hiking, cycling, and camping comfortably in spring, summer, and fall.
Regional Context
DeKalb County closely matches the Georgia statewide average temperature of 63.7°F.
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 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.