Sweetwater, TN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Sweetwater, a city in Monroe 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 95. Northeast wind around 0 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Sweetwater
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 88°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 mph | 36% |
| Tonight | 68°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 29% |
| Wednesday | 87°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph SW | 53% |
| Wednesday Night | 68°F | Chance Showers And Thunderstorms | 0 to 5 mph S | 50% |
| Thursday | 88°F | Chance Showers And Thunderstorms | 0 to 5 mph S | 50% |
| Thursday Night | 69°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph S | 50% |
| Friday | 88°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph SW | 39% |
| Friday Night | 68°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 39% |
| Saturday | 88°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 45% |
| Saturday Night | 69°F | Chance Showers And Thunderstorms | 0 mph | 45% |
| Sunday | 89°F | Chance Showers And Thunderstorms | 0 mph | 38% |
| Sunday Night | 70°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 38% |
| Monday | 89°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 40% |
| Monday Night | 71°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph SW | 40% |
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 Aug 4, 2026.