Knoxville, TN Weather & Growing Conditions
Today
94°F
Patchy Fog then Slight Chance Showers And Thunderstorms
Patchy fog before 9am, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 94. Heat index values as high as 101. Northeast wind 0 to 5 mph. Chance of precipitation is 20%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 94°F | Patchy Fog then Slight Chance Showers And Thunderstorms | 0 to 5 mph NE | 17% |
| Tonight | 69°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 0 to 5 mph NE | 15% |
| Sunday | 92°F | Mostly Sunny | 0 to 5 mph SW | 13% |
| Sunday Night | 68°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 26% |
| Monday | 92°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 0 to 5 mph W | 38% |
| Monday Night | 68°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 0 to 5 mph N | 63% |
| Tuesday | 86°F | Showers And Thunderstorms | 0 to 5 mph W | 86% |
| Tuesday Night | 65°F | Showers And Thunderstorms | 0 to 5 mph N | 86% |
| Wednesday | 81°F | Showers And Thunderstorms | 0 to 5 mph NW | 79% |
| Wednesday Night | 63°F | Showers And Thunderstorms | 0 to 5 mph NW | 79% |
| Thursday | 79°F | Chance Rain Showers | 0 to 5 mph NW | 39% |
| Thursday Night | 59°F | Slight Chance Rain Showers then Partly Cloudy | 0 to 5 mph N | 22% |
| Friday | 78°F | Mostly Sunny then Slight Chance Rain Showers | 0 to 5 mph N | 17% |
| Friday Night | 57°F | Slight Chance Rain Showers then Partly Cloudy | 5 mph NE | 17% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Knoxville, TN
Last spring frost
Apr 11
First fall frost
Oct 28
Growing season
198 days
Hardiness zone
7b
Explore more for Knoxville, TN: full frost dates · planting calendar · Tennessee frost dates
Climate data from the nearest NOAA station, Knoxville Exp Stn, Tn (10.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.