Altamont, TN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Altamont, a town in Grundy County, Tennessee.
This Afternoon
71°F
Mostly Sunny
Mostly sunny, with a high near 71. South southeast wind around 15 mph, with gusts as high as 30 mph.
7-day forecast for Altamont
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 71°F | Mostly Sunny | 15 mph SSE | 1% |
| Tonight | 60°F | Chance Rain Showers | 15 mph SSE | 85% |
| Wednesday | 68°F | Showers And Thunderstorms | 5 to 15 mph S | 95% |
| Wednesday Night | 53°F | Slight Chance Rain Showers then Areas Of Fog | 0 to 5 mph WSW | 15% |
| Thursday | 70°F | Areas Of Fog then Mostly Sunny | 0 to 5 mph W | 2% |
| Thursday Night | 47°F | Areas Of Fog | 0 mph | 2% |
| Friday | 67°F | Areas Of Fog then Sunny | 0 to 5 mph NW | 2% |
| Friday Night | 41°F | Partly Cloudy | 0 to 5 mph NNW | 2% |
| Saturday | 58°F | Mostly Sunny | 5 mph N | 0% |
| Saturday Night | 36°F | Mostly Cloudy | 0 to 5 mph N | 1% |
| Sunday | 59°F | Mostly Sunny | 0 to 5 mph NNW | 8% |
| Sunday Night | 35°F | Mostly Clear | 0 mph | 8% |
| Monday | 61°F | Sunny | 0 to 5 mph NW | 5% |
| Monday Night | 36°F | Mostly Clear | 0 mph | 1% |
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 Nov 3, 2026.