Altamont, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Altamont, a town in Deuel County, South Dakota.
This Afternoon
61°F
Rain Showers Likely
Rain showers likely and areas of fog before 5pm, then areas of fog and a chance of rain showers. Cloudy, with a high near 61. East wind 12 to 15 mph. Chance of precipitation is 70%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Altamont
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 61°F | Rain Showers Likely | 12 to 15 mph E | 68% |
| Tonight | 55°F | Areas Of Fog | 10 mph ENE | 53% |
| Saturday | 63°F | Areas Of Fog | 13 mph NE | 21% |
| Saturday Night | 52°F | Mostly Cloudy | 8 to 12 mph NNE | 7% |
| Sunday | 64°F | Mostly Cloudy | 14 mph NE | 9% |
| Sunday Night | 49°F | Chance Rain Showers | 8 to 12 mph ENE | 39% |
| Monday | 61°F | Chance Rain Showers | 10 mph E | 39% |
| Monday Night | 45°F | Mostly Cloudy | 5 to 8 mph E | 6% |
| Tuesday | 63°F | Partly Sunny | 5 to 12 mph ESE | 2% |
| Tuesday Night | 47°F | Partly Cloudy | 9 mph SE | 2% |
| Wednesday | 66°F | Mostly Sunny | 8 to 13 mph SSE | 9% |
| Wednesday Night | 51°F | Chance Rain Showers | 8 mph SSE | 29% |
| Thursday | 69°F | Chance Rain Showers | 7 to 10 mph S | 29% |
| Thursday Night | 53°F | Partly Cloudy | 7 mph S | 9% |
Forecast source: National Weather Service (api.weather.gov) for Altamont (44.841, -96.690). Updated through the day.
Growing snapshot for Altamont
Last spring frost
May 7
First fall frost
Oct 1
Growing season
146 days
Hardiness zone
4b
More local growing data for Altamont: nearby ZIP 57226 weather · frost dates · planting calendar · South Dakota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Clear Lake, Sd (3.1 mi from Altamont). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.