Lewis County Climate
Lewis County, Tennessee
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
58.4°F
Annual Precip
57.1"
Annual Snowfall
—
Extreme Heat Days
26
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
7b
Minimum winter temperature range for plant survival
4,430
Excellent for heat-loving crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Lewis County
Climate Verdict
Lewis County has a mild, with an average annual temperature of 58.4°F, very wet conditions receiving 57.1 inches of precipitation annually, occasional hot days — 26 per year above 90°F. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 37.8°F. summers are warm — July averages 77.2°F. The 39°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
Lewis County closely matches the Tennessee statewide average temperature of 58.0°F.
Climate Profile
About Lewis County Weather
A mild subtropical interior climate
Lewis County maintains an annual average temperature of 58.4°F, which is notably warmer than the national median. This climate is typical for the interior South, featuring long growing seasons and mild winters.
Typical Tennessee temperature profile
Lewis County stays just above the state average of 58.1°F with its 58.4°F annual mean. However, it receives 57.1 inches of rain, making it wetter than the average Tennessee locale.
Moderate heat compared to neighbors
While neighboring counties may see more extreme spikes, Lewis County averages 26 days of 90°F heat per year. This is significantly lower than some West Tennessee counties that see nearly double that amount.
Warm summers and wet winters
The summer average of 75.9°F is moderated by the region's 57.1 inches of annual precipitation. Winters are soft, with January temperatures averaging 37.8°F and very little recorded snowfall.
Rain gear and cooling systems
With precipitation levels exceeding the state average, residents should prioritize roof and gutter maintenance. The 26 days of extreme heat also require reliable air conditioning through the peak of July.
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.