Johnson County Climate
Johnson County, Tennessee
Avg Annual Temp
53.4°F
Annual Precip
47.2"
Annual Snowfall
12.0"
Extreme Heat Days
3.1
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Johnson County Weather
Tennessee's high-altitude cool spot
Johnson County is one of the coolest spots in the South, with an annual average temperature of just 53.4°F. This matches the national median, offering a climate more similar to the Northeast than the Sun Belt.
The coldest county in Tennessee
Ranking far below the state average of 58.1°F, Johnson County’s 53.4°F average reflects its high-elevation terrain. It is a significant outlier in a state known for sweltering summer heat.
Distinctly cooler and snowier
Johnson County receives 12.0 inches of snow annually, nearly triple what most other Tennessee counties experience. It also records 47.2 inches of annual precipitation, which is lower than the state's 55.9-inch average.
Rare heat and real winters
The county sees only 3 days of 90°F weather per year, providing a unique escape from the Southern heat. Winters are the harshest in the state, with January temperatures averaging a chilly 34.2°F.
Invest in winter gear
Winter tires and reliable heating systems are essential for the foot of snow that falls annually. Air conditioning is less of a priority here compared to almost any other county in Tennessee.
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.