Roslyn, SD Weather & Growing Conditions
This Afternoon
46°F
Chance Light Rain
A chance of rain. Cloudy. High near 46, with temperatures falling to around 43 in the afternoon. North wind 16 to 20 mph, with gusts as high as 43 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 46°F | Chance Light Rain | 16 to 20 mph N | 35% |
| Tonight | 35°F | Light Rain | 15 mph NNW | 82% |
| Wednesday | 41°F | Light Rain | 15 to 18 mph NNW | 85% |
| Wednesday Night | 31°F | Slight Chance Light Rain then Mostly Cloudy | 12 to 15 mph NNW | 21% |
| Thursday | 38°F | Partly Sunny | 8 to 14 mph N | 3% |
| Thursday Night | 28°F | Mostly Cloudy | 1 to 7 mph E | 0% |
| Friday | 42°F | Partly Sunny | 2 to 6 mph SSW | 0% |
| Friday Night | 30°F | Partly Cloudy | 3 to 7 mph SSW | 0% |
| Saturday | 52°F | Mostly Sunny | 7 to 13 mph WSW | 6% |
| Saturday Night | 33°F | Partly Cloudy | 8 mph W | 3% |
| Sunday | 53°F | Mostly Sunny | 6 to 9 mph SW | 2% |
| Sunday Night | 39°F | Partly Cloudy | 9 mph SW | 0% |
| Monday | 55°F | Mostly Sunny | 9 to 15 mph W | 0% |
| Monday Night | 36°F | Mostly Clear | 8 mph W | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Roslyn, SD
Last spring frost
May 2
First fall frost
Oct 9
Growing season
160 days
Hardiness zone
4b
Explore more for Roslyn, SD: full frost dates · planting calendar · South Dakota frost dates
Climate data from the nearest NOAA station, Roy Lake, Sd (11.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.