Stephan, SD Weather & Growing Conditions
This Afternoon
68°F
Patchy Fog
Patchy fog. Cloudy, with a high near 68. North northeast wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 68°F | Patchy Fog | 5 mph NNE | 3% |
| Tonight | 56°F | Areas Of Fog | 5 to 10 mph NNE | 6% |
| Saturday | 66°F | Areas Of Fog then Cloudy | 13 mph NNE | 8% |
| Saturday Night | 53°F | Cloudy then Chance Rain Showers | 13 mph NE | 25% |
| Sunday | 62°F | Chance Rain Showers | 15 mph ENE | 52% |
| Sunday Night | 51°F | Rain Showers | 13 mph ENE | 89% |
| Monday | 61°F | Rain Showers | 12 mph E | 85% |
| Monday Night | 47°F | Slight Chance Rain Showers then Mostly Cloudy | 7 to 10 mph ESE | 23% |
| Tuesday | 66°F | Mostly Cloudy | 10 to 17 mph SE | 10% |
| Tuesday Night | 52°F | Mostly Cloudy then Slight Chance Rain Showers | 16 mph SE | 15% |
| Wednesday | 70°F | Chance Rain Showers | 20 mph SSE | 27% |
| Wednesday Night | 54°F | Chance Rain Showers | 12 to 16 mph SE | 30% |
| Thursday | 72°F | Chance Rain Showers then Partly Sunny | 12 mph SE | 27% |
| Thursday Night | 55°F | Partly Cloudy | 10 mph SE | 8% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Stephan, SD
Last spring frost
May 10
First fall frost
Sep 29
Growing season
140 days
Hardiness zone
4b
Explore more for Stephan, SD: full frost dates · planting calendar · South Dakota frost dates
Climate data from the nearest NOAA station, Stephan 2 Nw, Sd (1.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.