Greenback, TN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Greenback, a city in Loudon County, Tennessee.
Today
88°F
Mostly Sunny then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 88. Heat index values as high as 96. Northeast wind around 0 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Greenback
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 88°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 mph | 50% |
| Tonight | 69°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 37% |
| Wednesday | 87°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph SW | 53% |
| Wednesday Night | 70°F | Chance Showers And Thunderstorms | 0 to 5 mph S | 51% |
| Thursday | 88°F | Chance Showers And Thunderstorms | 0 to 5 mph S | 50% |
| Thursday Night | 70°F | Chance Showers And Thunderstorms then Mostly Cloudy | 0 to 5 mph S | 50% |
| Friday | 89°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 48% |
| Friday Night | 70°F | Chance Showers And Thunderstorms | 0 to 5 mph S | 48% |
| Saturday | 88°F | Slight Chance Showers And Thunderstorms | 0 mph | 58% |
| Saturday Night | 70°F | Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms | 0 mph | 58% |
| Sunday | 89°F | Chance Showers And Thunderstorms | 0 mph | 44% |
| Sunday Night | 71°F | Chance Showers And Thunderstorms | 0 mph | 44% |
| Monday | 89°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 45% |
| Monday Night | 72°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph SW | 45% |
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 Aug 4, 2026.