Charleston, TN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Charleston, a city in Mcminn County, Tennessee.
Today
88°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 11am. Mostly sunny, with a high near 88. Heat index values as high as 95. West wind around 0 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Charleston
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 88°F | Chance Showers And Thunderstorms | 0 mph | 43% |
| Tonight | 70°F | Chance Showers And Thunderstorms then Mostly Cloudy | 0 mph | 37% |
| Wednesday | 87°F | Chance Showers And Thunderstorms | 0 to 5 mph S | 54% |
| Wednesday Night | 70°F | Chance Showers And Thunderstorms | 0 mph | 49% |
| Thursday | 88°F | Chance Showers And Thunderstorms | 0 to 5 mph S | 50% |
| Thursday Night | 71°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 50% |
| Friday | 89°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph SW | 34% |
| Friday Night | 70°F | Chance Showers And Thunderstorms | 0 to 5 mph N | 34% |
| Saturday | 89°F | Chance Showers And Thunderstorms | 0 mph | 50% |
| Saturday Night | 71°F | Chance Showers And Thunderstorms | 0 mph | 50% |
| Sunday | 89°F | Chance Showers And Thunderstorms | 0 mph | 39% |
| Sunday Night | 72°F | Chance Showers And Thunderstorms | 0 mph | 39% |
| Monday | 90°F | Chance Showers And Thunderstorms | 0 mph | 38% |
| Monday Night | 73°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 38% |
Forecast source: National Weather Service (api.weather.gov) for Charleston (35.286, -84.761). Updated through the day.
Growing snapshot for Charleston
Last spring frost
Apr 6
First fall frost
Oct 30
Growing season
206 days
Hardiness zone
7b
More local growing data for Charleston: nearby ZIP 37309 weather · frost dates · planting calendar · Tennessee frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Cleveland Fltr Plt, Tn (6.4 mi from Charleston). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.