Powell, TN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Powell, a community in Knox County, Tennessee.
Today
93°F
Patchy Fog then Slight Chance Showers And Thunderstorms
Patchy fog before 9am, then a slight chance of showers and thunderstorms. Sunny, with a high near 93. Heat index values as high as 101. Northeast wind around 0 mph. Chance of precipitation is 20%.
7-day forecast for Powell
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 93°F | Patchy Fog then Slight Chance Showers And Thunderstorms | 0 mph | 23% |
| Tonight | 69°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 0 mph | 21% |
| Sunday | 91°F | Mostly Sunny | 0 to 5 mph SW | 13% |
| Sunday Night | 68°F | Slight Chance Showers And Thunderstorms | 0 mph | 23% |
| Monday | 91°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 0 mph | 38% |
| Monday Night | 67°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 0 mph | 64% |
| Tuesday | 85°F | Showers And Thunderstorms | 0 mph | 84% |
| Tuesday Night | 65°F | Showers And Thunderstorms | 0 mph | 84% |
| Wednesday | 80°F | Showers And Thunderstorms | 0 to 5 mph NW | 75% |
| Wednesday Night | 62°F | Showers And Thunderstorms | 0 to 5 mph N | 75% |
| Thursday | 78°F | Chance Rain Showers | 0 to 5 mph N | 38% |
| Thursday Night | 59°F | Chance Rain Showers then Partly Cloudy | 0 to 5 mph N | 26% |
| Friday | 77°F | Mostly Sunny then Slight Chance Rain Showers | 0 to 5 mph N | 16% |
| Friday Night | 57°F | Slight Chance Rain Showers then Partly Cloudy | 5 mph N | 16% |
Forecast source: National Weather Service (api.weather.gov) for Powell (36.036, -84.030). Updated through the day.
Growing snapshot for Powell
Last spring frost
Mar 31
First fall frost
Nov 4
Growing season
218 days
Hardiness zone
7b
More local growing data for Powell: nearby ZIP 37849 weather · frost dates · planting calendar · Tennessee frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Oak Ridge Asos, Tn (10.8 mi from Powell). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.