Sweetwater, TN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Sweetwater, a city in Monroe County, Tennessee.
Overnight
68°F
Partly Cloudy
Partly cloudy, with a low around 68. Wind around 0 mph.
7-day forecast for Sweetwater
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 68°F | Partly Cloudy | 0 mph | 2% |
| Saturday | 94°F | Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph NE | 21% |
| Saturday Night | 68°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph S | 22% |
| Sunday | 92°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph SW | 18% |
| Sunday Night | 68°F | Chance Showers And Thunderstorms then Mostly Cloudy | 0 mph | 29% |
| Monday | 92°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 mph | 36% |
| Monday Night | 66°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 0 mph | 67% |
| Tuesday | 86°F | Showers And Thunderstorms | 0 mph | 84% |
| Tuesday Night | 63°F | Showers And Thunderstorms | 0 mph | 84% |
| Wednesday | 80°F | Showers And Thunderstorms | 0 mph | 76% |
| Wednesday Night | 61°F | Showers And Thunderstorms | 0 mph | 76% |
| Thursday | 79°F | Slight Chance Rain Showers | 0 to 5 mph NW | 23% |
| 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% |
Forecast source: National Weather Service (api.weather.gov) for Sweetwater (35.603, -84.473). Updated through the day.
Growing snapshot for Sweetwater
Last spring frost
Apr 10
First fall frost
Oct 27
Growing season
199 days
Hardiness zone
7b
More local growing data for Sweetwater: nearby ZIP 37874 weather · frost dates · planting calendar · Tennessee frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Decatur 7Ne, Tn (12 mi from Sweetwater). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.