Sumner County Climate
Sumner County, Tennessee
Avg Annual Temp
57.7°F
Annual Precip
54.5"
Annual Snowfall
3.3"
Extreme Heat Days
37.266666666666666
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Sumner County Weather
A Typical Mid-American Profile
Sumner County averages 57.7°F annually, sitting just above the national median temperature. It records 54.5 inches of precipitation, reflecting the humid climate of the southeastern United States.
Near the Heart of Tennessee
Sumner’s 57.7°F average temperature is nearly identical to the state average of 58.1°F. Its precipitation levels are also very close to the state average of 55.9 inches.
Similar to the Nashville Metro
Sumner County shares the climate of the Nashville basin, mirroring the temperature and rainfall of its southern neighbor, Davidson County. It serves as a middle-ground between the hot southern plains and the cooler northern hills.
Hot July and Short Winters
The county sees 37 days of extreme heat, with July temperatures averaging 78.1°F. Winter remains mild at 38.3°F, with snowfall averaging only 3.3 inches per year.
Prepare for July Heat Waves
Summer cooling is the primary climate concern with 37 days over 90°F. The 3.3 inches of snow means winter weather is usually a brief inconvenience rather than a seasonal obstacle.
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.