Decatur County Climate
Decatur County, Tennessee
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
60.2°F
Annual Precip
57.1"
Annual Snowfall
1.6"
Extreme Heat Days
64
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
7b
Minimum winter temperature range for plant survival
4,892
Excellent for heat-loving crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Decatur County
Climate Verdict
Decatur County has a warm, averaging 60.2°F year-round, very wet conditions receiving 57.1 inches of precipitation annually, significant summer heat with 64 days annually above 90°F, light snow averaging 1.6 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 39.4°F. summers are warm — July averages 79.9°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
Decatur County closely matches the Tennessee statewide average temperature of 58.0°F, the county experiences 27.54007168458783 more extreme heat days than the state average.
Climate Profile
About Decatur County Weather
Above Average National Temperatures
Decatur County's 60.2°F annual average reflects a climate much warmer than the national median. This region experiences consistent humidity and high annual precipitation totals.
Warmer and Wetter Than Average
At 60.2°F, the county is 2.1 degrees warmer than the Tennessee average of 58.1°F. Its 57.1 inches of annual rainfall also exceeds the state average, marking it as a particularly moist region.
The Heat of West Tennessee
Decatur faces 64 extreme heat days, far exceeding the 38 days recorded in DeKalb County to the east. The 60.2°F average temperature makes it one of the warmer spots in the immediate region.
Extreme Heat and Mild Winters
Summers are demanding, with 64 days hitting 90°F or higher and a July average of 79.9°F. Winters provide relief with very little snow, averaging only 1.6 inches annually.
Durable Cooling and Rain Gear
With 64 days of extreme heat, a robust and efficient air conditioning system is a resident's top priority. The 57.1 inches of rain suggests keeping reliable umbrellas and waterproof boots on hand year-round.
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.