Stephan, SD Weather & Growing Conditions
This Afternoon
45°F
Cloudy
Cloudy. High near 45, with temperatures falling to around 42 in the afternoon. North northwest wind around 23 mph, with gusts as high as 33 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 45°F | Cloudy | 23 mph NNW | 5% |
| Tonight | 35°F | Cloudy | 14 to 20 mph NNW | 7% |
| Wednesday | 46°F | Chance Light Rain | 15 to 18 mph NW | 25% |
| Wednesday Night | 33°F | Mostly Cloudy | 12 to 15 mph NNW | 9% |
| Thursday | 48°F | Mostly Sunny | 7 to 12 mph N | 0% |
| Thursday Night | 27°F | Partly Cloudy | 6 mph E | 0% |
| Friday | 47°F | Mostly Sunny | 5 to 8 mph SSE | 0% |
| Friday Night | 30°F | Partly Cloudy | 5 mph SSW | 0% |
| Saturday | 58°F | Mostly Sunny | 5 to 13 mph W | 5% |
| Saturday Night | 34°F | Mostly Clear | 5 to 8 mph W | 1% |
| Sunday | 58°F | Sunny | 5 to 10 mph S | 0% |
| Sunday Night | 38°F | Mostly Clear | 10 mph SSW | 0% |
| Monday | 59°F | Sunny | 8 to 16 mph NW | 0% |
| Monday Night | 36°F | Partly Cloudy | 7 mph NW | 0% |
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 Nov 4, 2026.