DeKalb County Climate
DeKalb County, Tennessee
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
58.1°F
Annual Precip
56.9"
Annual Snowfall
3.1"
Extreme Heat Days
38
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
7b
Minimum winter temperature range for plant survival
4,376
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 mild, with an average annual temperature of 58.1°F, very wet conditions receiving 56.9 inches of precipitation annually, occasional hot days — 37.95 per year above 90°F, light snow averaging 3.1 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 37.3°F. summers are warm — July averages 77.8°F. The 41°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 Tennessee statewide average temperature of 58.0°F.
Climate Profile
About DeKalb County Weather
A Classic Subtropical Climate
DeKalb County's 58.1°F annual average is warmer than the national median, fitting firmly into the humid subtropical category. The region sees ample rainfall and moderate seasonal shifts.
The Benchmark for Tennessee
DeKalb County perfectly matches the Tennessee state average annual temperature of 58.1°F. However, its 56.9 inches of annual rain is slightly higher than the state average of 55.9 inches.
Wetter Than Nearby Davidson
DeKalb is more prone to rain than Davidson County, receiving about 5 more inches of precipitation annually. It is also cooler in the summer, with 10 fewer extreme heat days than Nashville.
Moderate Peaks and Valleys
The county experiences 38 days of extreme heat and a July average of 77.8°F. Winter brings a modest 3.1 inches of snow and a January average of 37.3°F.
Prepare for Significant Rainfall
With nearly 57 inches of annual rain, residents should prioritize roof maintenance and gutter clearance. The moderate 3.1 inches of snow means basic winter tires are usually sufficient for the season.
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.