Greenback, TN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Greenback, a city in Loudon County, Tennessee.
This Afternoon
94°F
Sunny
Sunny, with a high near 94. Heat index values as high as 102. North wind 0 to 5 mph.
7-day forecast for Greenback
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 94°F | Sunny | 0 to 5 mph N | 14% |
| Tonight | 69°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 0 to 5 mph S | 16% |
| Sunday | 93°F | Mostly Sunny | 0 to 5 mph SW | 15% |
| Sunday Night | 67°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 28% |
| Monday | 93°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 mph | 31% |
| Monday Night | 67°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 0 mph | 65% |
| Tuesday | 87°F | Showers And Thunderstorms | 0 mph | 87% |
| Tuesday Night | 64°F | Showers And Thunderstorms | 0 mph | 87% |
| Wednesday | 81°F | Showers And Thunderstorms | 0 mph | 80% |
| Wednesday Night | 62°F | Showers And Thunderstorms | 0 mph | 80% |
| Thursday | 80°F | Chance Rain Showers | 0 to 5 mph N | 29% |
| Thursday Night | 60°F | Chance Rain Showers | 0 to 5 mph N | 26% |
| Friday | 79°F | Mostly Sunny then Slight Chance Rain Showers | 0 to 5 mph NE | 19% |
| Friday Night | 58°F | Slight Chance Rain Showers then Partly Cloudy | 5 mph NE | 19% |
Forecast source: National Weather Service (api.weather.gov) for Greenback (35.647, -84.168). Updated through the day.
Growing snapshot for Greenback
Last spring frost
Apr 5
First fall frost
Nov 1
Growing season
210 days
Hardiness zone
7b
More local growing data for Greenback: nearby ZIP 37742 weather · frost dates · planting calendar · Tennessee frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Lenoir City, Tn (9 mi from Greenback). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.