Harman US

Jefferson City, TN Weather & Growing Conditions

This Afternoon
91°F
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms after 5pm. Sunny, with a high near 91. Heat index values as high as 96. North wind 0 to 5 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.

7-day forecast

WhenTempForecastWindPrecip
This Afternoon 91°F Slight Chance Showers And Thunderstorms 0 to 5 mph N 17%
Tonight 67°F Slight Chance Showers And Thunderstorms then Mostly Clear 0 to 5 mph NE 21%
Sunday 90°F Mostly Sunny then Slight Chance Showers And Thunderstorms 0 to 5 mph SW 18%
Sunday Night 67°F Chance Showers And Thunderstorms 0 to 5 mph W 30%
Monday 90°F Chance Rain Showers then Chance Showers And Thunderstorms 0 to 5 mph W 40%
Monday Night 66°F Chance Showers And Thunderstorms then Showers And Thunderstorms Likely 0 to 5 mph NE 68%
Tuesday 84°F Showers And Thunderstorms 0 to 5 mph W 84%
Tuesday Night 64°F Showers And Thunderstorms 0 mph 84%
Wednesday 79°F Showers And Thunderstorms 0 to 5 mph NE 80%
Wednesday Night 61°F Showers And Thunderstorms 0 to 5 mph N 80%
Thursday 77°F Chance Rain Showers 0 to 5 mph N 40%
Thursday Night 58°F Slight Chance Rain Showers then Partly Cloudy 0 to 5 mph N 21%
Friday 76°F Slight Chance Rain Showers 0 to 5 mph N 17%
Friday Night 56°F Slight Chance Rain Showers then Partly Cloudy 0 to 5 mph NE 17%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for Jefferson City, TN

Last spring frost
Apr 24
First fall frost
Oct 17
Growing season
175 days
Hardiness zone
7b

Explore more for Jefferson City, TN: full frost dates · planting calendar · Tennessee frost dates

Climate data from the nearest NOAA station, Jefferson City, Tn (1.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.