Hamilton County Climate
Hamilton County, Tennessee
Avg Annual Temp
59.1°F
Annual Precip
58.9"
Annual Snowfall
4.0"
Extreme Heat Days
27.3
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Hamilton County Weather
Warm Valley with High Humidity
Hamilton County's average temperature of 59.1°F is significantly higher than the national median. The region is very wet, receiving 58.9 inches of annual precipitation.
Warmer than the State Average
Hamilton stays a full degree warmer than the Tennessee average of 58.1°F. Its location in the southern Tennessee River valley traps heat more effectively than northern neighbors.
Much Warmer than Plateau Neighbors
At 59.1°F, Hamilton is over 4 degrees warmer than Grundy County. It shares a similar high-precipitation profile with Franklin County, both averaging around 60 inches of rain.
Hot Summers and Light Snow
Residents face 27 days of extreme heat over 90°F each year. Winter is mild with only 4 inches of annual snow and January lows averaging a manageable 39°F.
Invest in High-Efficiency Cooling
With a summer average of 76.2°F and frequent 90-degree days, AC systems will work hard here. Keep umbrellas handy year-round to manage the nearly 59 inches of rainfall.
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.