Knoxville, TN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Knoxville, a city in Knox County, Tennessee.
Tonight
70°F
Slight Chance Showers And Thunderstorms then Partly Cloudy
A slight chance of showers and thunderstorms before 9pm. Partly cloudy, with a low around 70. Northeast wind around 0 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Knoxville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 70°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 23% |
| Sunday | 93°F | Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph SW | 18% |
| Sunday Night | 70°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 15% |
| Monday | 92°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 mph | 41% |
| Monday Night | 69°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 0 mph | 58% |
| Tuesday | 88°F | Showers And Thunderstorms | 0 mph | 81% |
| Tuesday Night | 67°F | Showers And Thunderstorms | 0 mph | 81% |
| Wednesday | 82°F | Showers And Thunderstorms | 0 mph | 87% |
| Wednesday Night | 65°F | Showers And Thunderstorms | 0 mph | 87% |
| Thursday | 79°F | Chance Rain Showers | 0 to 5 mph NW | 53% |
| Thursday Night | 61°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph N | 38% |
| Friday | 79°F | Mostly Sunny then Slight Chance Rain Showers | 0 to 5 mph N | 17% |
| Friday Night | 58°F | Slight Chance Rain Showers then Partly Cloudy | 5 mph N | 17% |
| Saturday | 78°F | Mostly Sunny | 5 mph NE | 10% |
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 Sep 20, 2026.