Sumner County Climate
Sumner County, Tennessee
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
57.7°F
Annual Precip
54.5"
Annual Snowfall
3.3"
Extreme Heat Days
37
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
7b
Minimum winter temperature range for plant survival
4,360
Excellent for heat-loving crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Sumner County
Climate Verdict
Sumner County has a mild, with an average annual temperature of 57.7°F, moderately wet with 54.5 inches of annual precipitation, occasional hot days — 37.266666666666666 per year above 90°F, light snow averaging 3.3 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 36.0°F. summers are warm — July averages 78.1°F. The 42°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
Sumner County closely matches the Tennessee statewide average temperature of 58.0°F.
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 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.