DeKalb County Climate
DeKalb County, Tennessee
Avg Annual Temp
58.1°F
Annual Precip
56.9"
Annual Snowfall
3.1"
Extreme Heat Days
37.95
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
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 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.