Knox County Climate
Knox County, Tennessee
Avg Annual Temp
57.9°F
Annual Precip
55.8"
Annual Snowfall
—
Extreme Heat Days
36.1
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
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 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.