Knoxville, TN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Knoxville, a city in Knox County, Tennessee.
Today
89°F
Mostly Sunny then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 2pm. Mostly sunny. High near 89, with temperatures falling to around 86 in the afternoon. Heat index values as high as 96. North wind around 0 mph. Chance of precipitation is 40%.
7-day forecast for Knoxville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 89°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 mph | 40% |
| Tonight | 70°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 36% |
| Wednesday | 88°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph W | 52% |
| Wednesday Night | 71°F | Chance Showers And Thunderstorms | 0 mph | 50% |
| Thursday | 88°F | Chance Showers And Thunderstorms | 0 to 5 mph S | 50% |
| Thursday Night | 71°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph S | 50% |
| Friday | 89°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph SW | 38% |
| Friday Night | 71°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 38% |
| Saturday | 88°F | Partly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph SW | 45% |
| Saturday Night | 71°F | Chance Showers And Thunderstorms | 0 mph | 45% |
| Sunday | 89°F | Chance Showers And Thunderstorms | 0 mph | 34% |
| Sunday Night | 72°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 34% |
| Monday | 89°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 36% |
| Monday Night | 73°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 36% |
Forecast source: National Weather Service (api.weather.gov) for Knoxville (35.971, -83.949). Updated through the day.
Growing snapshot for Knoxville
Last spring frost
Apr 11
First fall frost
Oct 28
Growing season
198 days
Hardiness zone
7b
More local growing data for Knoxville: nearby ZIP 37916 weather · frost dates · planting calendar · Tennessee frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Knoxville Exp Stn, Tn (4 mi from Knoxville). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.