Altamont, TN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Altamont, a town in Grundy County, Tennessee.
Today
82°F
Patchy Fog then Slight Chance Showers And Thunderstorms
Patchy fog before 9am, then a slight chance of showers and thunderstorms between noon and 1pm, then showers and thunderstorms likely between 1pm and 5pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 82. North northeast wind around 0 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Altamont
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 82°F | Patchy Fog then Slight Chance Showers And Thunderstorms | 0 mph | 60% |
| Tonight | 66°F | Chance Showers And Thunderstorms then Patchy Fog | 0 mph | 29% |
| Wednesday | 81°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 0 mph | 56% |
| Wednesday Night | 67°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 39% |
| Thursday | 83°F | Chance Showers And Thunderstorms | 0 to 5 mph SSW | 44% |
| Thursday Night | 68°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph SSE | 44% |
| Friday | 83°F | Chance Showers And Thunderstorms | 0 to 5 mph S | 46% |
| Friday Night | 67°F | Chance Showers And Thunderstorms | 0 mph | 46% |
| Saturday | 83°F | Chance Showers And Thunderstorms | 0 mph | 66% |
| Saturday Night | 68°F | Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms | 0 mph | 66% |
| Sunday | 83°F | Chance Showers And Thunderstorms | 0 mph | 52% |
| Sunday Night | 69°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 52% |
| Monday | 83°F | Chance Showers And Thunderstorms | 0 mph | 47% |
| Monday Night | 69°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 47% |
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 Aug 4, 2026.