Altamont, TN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Altamont, a town in Grundy County, Tennessee.
Tonight
69°F
Mostly Clear
Mostly clear, with a low around 69. East wind around 0 mph.
7-day forecast for Altamont
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 69°F | Mostly Clear | 0 mph | 10% |
| Saturday | 90°F | Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph NW | 26% |
| Saturday Night | 68°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 0 to 5 mph SSE | 23% |
| Sunday | 88°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph SW | 22% |
| Sunday Night | 67°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 22% |
| Monday | 88°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 mph | 51% |
| Monday Night | 65°F | Chance Showers And Thunderstorms | 0 mph | 51% |
| Tuesday | 83°F | Showers And Thunderstorms Likely | 0 mph | 73% |
| Tuesday Night | 63°F | Showers And Thunderstorms Likely | 0 mph | 73% |
| Wednesday | 78°F | Chance Rain Showers | 0 to 5 mph N | 51% |
| Wednesday Night | 59°F | Chance Rain Showers then Partly Cloudy | 0 mph | 51% |
| Thursday | 75°F | Mostly Sunny then Slight Chance Rain Showers | 0 to 5 mph N | 16% |
| Thursday Night | 57°F | Slight Chance Rain Showers then Partly Cloudy | 0 to 5 mph NNE | 16% |
| Friday | 75°F | Mostly Sunny | 0 to 5 mph N | 12% |
Forecast source: National Weather Service (api.weather.gov) for Altamont (35.434, -85.739). Updated through the day.
Growing snapshot for Altamont
Last spring frost
Apr 21
First fall frost
Oct 20
Growing season
182 days
Hardiness zone
7a
More local growing data for Altamont: nearby ZIP 37305 weather · frost dates · planting calendar · Tennessee frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Coalmont, Tn (6.2 mi from Altamont). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.