Signal Mountain, TN Weather & Growing Conditions
Tonight
72°F
Mostly Clear
Mostly clear, with a low around 72. North wind 0 to 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 72°F | Mostly Clear | 0 to 5 mph N | 3% |
| Saturday | 93°F | Sunny then Chance Showers And Thunderstorms | 0 mph | 51% |
| Saturday Night | 71°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph E | 34% |
| Sunday | 90°F | Sunny then Chance Showers And Thunderstorms | 0 to 5 mph S | 35% |
| Sunday Night | 70°F | Chance Showers And Thunderstorms | 0 mph | 35% |
| Monday | 90°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 mph | 51% |
| Monday Night | 69°F | Chance Showers And Thunderstorms | 0 mph | 51% |
| Tuesday | 86°F | Showers And Thunderstorms Likely | 0 mph | 71% |
| Tuesday Night | 67°F | Showers And Thunderstorms Likely | 0 to 5 mph SE | 71% |
| Wednesday | 81°F | Chance Rain Showers | 0 to 5 mph SW | 50% |
| Wednesday Night | 63°F | Chance Showers And Thunderstorms | 5 mph N | 50% |
| Thursday | 79°F | Mostly Sunny | 0 to 5 mph N | 14% |
| Thursday Night | 61°F | Partly Cloudy | 5 mph N | 14% |
| Friday | 78°F | Mostly Sunny | 5 mph N | 11% |
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 Sep 19, 2026.