Cannon County Climate
Cannon County, Tennessee
Avg Annual Temp
58.4°F
Annual Precip
57.6"
Annual Snowfall
—
Extreme Heat Days
55.2
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Cannon County Weather
Warmer and Rainier Than the U.S. Median
Cannon County’s 58.4°F average temperature is over 3 degrees warmer than the national median. It is a high-precipitation county, receiving 57.6 inches of rain annually.
Slightly Above the Tennessee Temperature Average
Cannon is just 0.3 degrees warmer than the Tennessee state average. It receives nearly 2 inches more precipitation than the state norm of 55.9 inches.
The Regional Leader in Extreme Heat
Cannon faces 55 days of extreme heat, more than any other county in this group. While its annual average is similar to Anderson, its summer peaks are much more frequent.
Nearly Two Months of Extreme Heat
July averages 77.6°F, but the real story is the 55 days reaching 90°F or higher. Winters are mild at 40.3°F, though historical snowfall data for the county is limited.
Prepare for Prolonged Summer Heat Waves
Residents must maintain high-performance air conditioning to navigate the 55 days of extreme heat. Given the 57.6 inches of rain, keeping a waterproof emergency kit and clear drainage is also vital.
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.