Signal Mountain, TN Weather & Growing Conditions
Today
85°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 11am. Mostly sunny, with a high near 85. East wind 0 to 5 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Chance Showers And Thunderstorms | 0 to 5 mph E | 43% |
| Tonight | 69°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 54% |
| Wednesday | 84°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph SE | 62% |
| Wednesday Night | 69°F | Chance Showers And Thunderstorms | 0 mph | 54% |
| Thursday | 85°F | Chance Showers And Thunderstorms | 0 to 5 mph S | 48% |
| Thursday Night | 69°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph SE | 48% |
| Friday | 86°F | Chance Showers And Thunderstorms | 0 to 5 mph S | 39% |
| Friday Night | 69°F | Chance Showers And Thunderstorms | 0 to 5 mph S | 39% |
| Saturday | 85°F | Chance Showers And Thunderstorms | 0 mph | 67% |
| Saturday Night | 70°F | Showers And Thunderstorms Likely | 0 mph | 67% |
| Sunday | 86°F | Chance Showers And Thunderstorms | 0 mph | 51% |
| Sunday Night | 70°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 51% |
| Monday | 86°F | Chance Showers And Thunderstorms | 0 mph | 44% |
| Monday Night | 71°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 44% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Signal Mountain, TN
Last spring frost
Mar 31
First fall frost
Nov 6
Growing season
219 days
Hardiness zone
7b
Explore more for Signal Mountain, TN: full frost dates · planting calendar · Tennessee frost dates
Climate data from the nearest NOAA station, Lookout Mtn-Point Park, Tn (8.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.