De Smet, SD Weather & Growing Conditions
Tonight
57°F
Patchy Fog
Patchy fog. Cloudy, with a low around 57. East northeast wind around 10 mph. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 57°F | Patchy Fog | 10 mph ENE | 12% |
| Saturday | 65°F | Patchy Fog then Cloudy | 10 mph NE | 9% |
| Saturday Night | 53°F | Mostly Cloudy | 10 mph NE | 1% |
| Sunday | 63°F | Mostly Cloudy then Chance Rain Showers | 15 mph ENE | 32% |
| Sunday Night | 51°F | Chance Rain Showers | 10 to 15 mph ENE | 51% |
| Monday | 60°F | Chance Rain Showers | 10 mph E | 51% |
| Monday Night | 47°F | Mostly Cloudy | 5 to 10 mph E | 6% |
| Tuesday | 64°F | Partly Sunny | 10 mph SE | 2% |
| Tuesday Night | 49°F | Mostly Cloudy | 10 mph SE | 4% |
| Wednesday | 67°F | Partly Sunny | 15 mph SSE | 11% |
| Wednesday Night | 53°F | Chance Rain Showers | 10 mph SSE | 35% |
| Thursday | 67°F | Slight Chance Showers And Thunderstorms | 10 mph SSE | 35% |
| Thursday Night | 54°F | Mostly Cloudy | 5 to 10 mph SE | 10% |
| Friday | 69°F | Partly Sunny | 10 to 15 mph SE | 10% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for De Smet, SD
Last spring frost
May 5
First fall frost
Oct 4
Growing season
151 days
Hardiness zone
4b
Explore more for De Smet, SD: full frost dates · planting calendar · South Dakota frost dates
Climate data from the nearest NOAA station, De Smet, Sd (1.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.