Sweetwater, TN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Sweetwater, a city in Monroe County, Tennessee.
Overnight
61°F
Chance Rain Showers
A chance of rain showers after 5am. Cloudy. Low around 61, with temperatures rising to around 64 overnight. South wind around 10 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Sweetwater
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 61°F | Chance Rain Showers | 10 mph S | 26% |
| Wednesday | 70°F | Showers And Thunderstorms | 10 to 15 mph S | 85% |
| Wednesday Night | 59°F | Showers And Thunderstorms | 0 to 10 mph SW | 94% |
| Thursday | 73°F | Partly Sunny | 0 to 5 mph W | 5% |
| Thursday Night | 48°F | Partly Cloudy | 0 mph | 4% |
| Friday | 70°F | Sunny | 0 to 5 mph N | 4% |
| Friday Night | 42°F | Mostly Clear | 0 to 5 mph N | 1% |
| Saturday | 61°F | Mostly Sunny | 5 to 10 mph N | 1% |
| Saturday Night | 34°F | Partly Cloudy | 0 to 5 mph N | 0% |
| Sunday | 59°F | Mostly Sunny | 0 to 5 mph NE | 0% |
| Sunday Night | 33°F | Mostly Clear | 0 mph | 1% |
| Monday | 61°F | Sunny | 0 to 5 mph N | 1% |
| Monday Night | 33°F | Mostly Clear | 0 mph | 1% |
| Tuesday | 66°F | Sunny | 0 mph | 2% |
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 Nov 4, 2026.