Grenville, SD Weather & Growing Conditions
Overnight
56°F
Areas Of Fog
Areas of fog and a slight chance of drizzle. Cloudy, with a low around 56. East northeast wind around 8 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 56°F | Areas Of Fog | 8 mph ENE | 13% |
| Saturday | 63°F | Areas Of Fog | 8 to 12 mph NE | 13% |
| Saturday Night | 50°F | Mostly Cloudy then Slight Chance Rain Showers | 7 to 10 mph NE | 18% |
| Sunday | 62°F | Slight Chance Rain Showers then Mostly Cloudy | 13 mph NE | 16% |
| Sunday Night | 47°F | Mostly Cloudy | 9 mph E | 6% |
| Monday | 63°F | Partly Sunny | 9 mph E | 6% |
| Monday Night | 44°F | Partly Cloudy | 7 mph SE | 6% |
| Tuesday | 64°F | Mostly Sunny | 6 to 14 mph SE | 1% |
| Tuesday Night | 46°F | Partly Cloudy | 10 mph SSE | 2% |
| Wednesday | 66°F | Mostly Sunny | 10 to 15 mph SSE | 10% |
| Wednesday Night | 50°F | Chance Rain Showers | 12 mph SSE | 30% |
| Thursday | 68°F | Chance Rain Showers then Partly Sunny | 12 mph SSE | 30% |
| Thursday Night | 53°F | Mostly Cloudy then Slight Chance Rain Showers | 9 mph SSE | 19% |
| Friday | 70°F | Slight Chance Rain Showers then Partly Sunny | 9 to 14 mph SSE | 19% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Grenville, SD
Last spring frost
May 1
First fall frost
Oct 12
Growing season
164 days
Hardiness zone
4b
Explore more for Grenville, SD: full frost dates · planting calendar · South Dakota frost dates
Climate data from the nearest NOAA station, Waubay Natl Wild Life, Sd (6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.