Grass Ranch Colony, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Grass Ranch Colony, a community in Brule County, South Dakota.
Tonight
59°F
Cloudy
Cloudy. Low around 59, with temperatures rising to around 62 overnight. North wind 5 to 10 mph.
7-day forecast for Grass Ranch Colony
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 59°F | Cloudy | 5 to 10 mph N | 9% |
| Saturday | 66°F | Patchy Fog then Cloudy | 10 mph N | 11% |
| Saturday Night | 55°F | Cloudy | 10 mph NE | 9% |
| Sunday | 62°F | Rain Showers Likely | 10 to 15 mph NE | 56% |
| Sunday Night | 52°F | Rain Showers | 10 mph ENE | 89% |
| Monday | 60°F | Rain Showers | 10 mph ENE | 89% |
| Monday Night | 48°F | Mostly Cloudy | 5 to 10 mph E | 11% |
| Tuesday | 65°F | Mostly Cloudy | 5 to 15 mph SE | 11% |
| Tuesday Night | 51°F | Mostly Cloudy | 10 to 15 mph SE | 12% |
| Wednesday | 69°F | Chance Rain Showers | 15 mph SSE | 28% |
| Wednesday Night | 54°F | Chance Showers And Thunderstorms | 10 to 15 mph SSE | 40% |
| Thursday | 71°F | Chance Rain Showers then Partly Sunny | 10 mph SSE | 40% |
| Thursday Night | 55°F | Partly Cloudy | 10 mph SE | 10% |
| Friday | 71°F | Partly Sunny | 10 to 15 mph SE | 11% |
Forecast source: National Weather Service (api.weather.gov) for Grass Ranch Colony (43.650, -98.884). Updated through the day.
Growing snapshot for Grass Ranch Colony
Last spring frost
May 3
First fall frost
Oct 5
Growing season
153 days
Hardiness zone
5a
More local growing data for Grass Ranch Colony: nearby ZIP 57355 weather · frost dates · planting calendar · South Dakota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, White Lake, Sd (14.6 mi from Grass Ranch Colony). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.