Delmont, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Delmont, a city in Douglas County, South Dakota.
Tonight
37°F
Chance Rain Showers
A chance of rain showers. Cloudy. Low around 37, with temperatures rising to around 40 overnight. Northwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Delmont
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 37°F | Chance Rain Showers | 15 to 20 mph NW | 29% |
| Wednesday | 46°F | Rain Showers Likely | 15 to 20 mph NW | 63% |
| Wednesday Night | 35°F | Chance Rain Showers then Mostly Cloudy | 10 to 15 mph NW | 40% |
| Thursday | 48°F | Partly Sunny | 10 to 15 mph NNW | 6% |
| Thursday Night | 29°F | Mostly Cloudy | 0 to 10 mph N | 0% |
| Friday | 48°F | Mostly Sunny | 0 to 5 mph S | 0% |
| Friday Night | 31°F | Partly Cloudy | 5 mph S | 0% |
| Saturday | 59°F | Sunny | 5 to 10 mph W | 4% |
| Saturday Night | 35°F | Mostly Clear | 5 mph W | 3% |
| Sunday | 60°F | Sunny | 5 to 10 mph SW | 1% |
| Sunday Night | 40°F | Mostly Clear | 10 mph SSW | 0% |
| Monday | 61°F | Sunny | 10 to 15 mph WNW | 0% |
| Monday Night | 37°F | Mostly Clear | 5 mph WNW | 0% |
| Tuesday | 59°F | Mostly Sunny | 5 to 10 mph SSW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Delmont (43.267, -98.159). Updated through the day.
Growing snapshot for Delmont
Last spring frost
May 3
First fall frost
Oct 6
Growing season
157 days
Hardiness zone
5a
More local growing data for Delmont: nearby ZIP 57330 weather · frost dates · planting calendar · South Dakota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Armour, Sd (10.2 mi from Delmont). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.