Knox County Climate
Knox County, Tennessee
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
57.9°F
Annual Precip
55.8"
Annual Snowfall
—
Extreme Heat Days
36
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
7b
Minimum winter temperature range for plant survival
4,278
Excellent for heat-loving crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Knox County
Climate Verdict
Knox County has a mild, with an average annual temperature of 57.9°F, very wet conditions receiving 55.8 inches of precipitation annually, occasional hot days — 36.1 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 37.1°F. summers are warm — July averages 77.2°F. The 40°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
Knox County closely matches the Tennessee statewide average temperature of 58.0°F.
Climate Profile
About Knox County Weather
Balanced four-season valley climate
Knox County averages 57.9°F annually, sitting roughly 4 degrees above the national median temperature. It experiences a typical humid subtropical climate with warm summers and manageable winters.
Mirroring the Tennessee state average
At 57.9°F, Knox County almost perfectly aligns with the Tennessee state average of 58.1°F. It serves as a climate benchmark for the eastern part of the state, neither extremely hot nor cold.
Standard rainfall for the region
The county receives 55.8 inches of annual precipitation, nearly identical to the state average of 55.9 inches. It maintains a warmer profile than the nearby Smoky Mountain counties but stays cooler than the Mississippi River valley.
Sunny summers and crisp winters
July brings an average of 77.2°F with 36 days of extreme heat reaching 90°F or higher. Winters are temperate, with a January average of 37.1°F and infrequent heavy snow events.
Versatile home climate control
Residents should prepare for high humidity in the summer and occasional freezing rain in the winter. While snowfall data is limited, the 39.5°F winter average suggests that winter weather mostly results in rain or slush.
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.