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.
Today
72°F
Partly Sunny
Partly sunny, with a high near 72. Northwest wind around 10 mph.
7-day forecast for Grass Ranch Colony
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 72°F | Partly Sunny | 10 mph NW | 13% |
| Tonight | 54°F | Partly Cloudy | 5 mph WSW | 2% |
| Wednesday | 79°F | Mostly Sunny | 5 to 10 mph SSW | 1% |
| Wednesday Night | 59°F | Partly Cloudy | 10 mph S | 1% |
| Thursday | 86°F | Sunny | 10 to 15 mph S | 6% |
| Thursday Night | 64°F | Mostly Clear | 10 to 15 mph S | 6% |
| Friday | 90°F | Sunny | 10 mph S | 6% |
| Friday Night | 66°F | Mostly Clear | 10 mph SSE | 6% |
| Saturday | 93°F | Sunny | 10 to 20 mph SSE | 4% |
| Saturday Night | 66°F | Mostly Clear | 10 to 20 mph SE | 9% |
| Sunday | 90°F | Mostly Sunny | 10 to 15 mph ESE | 5% |
| Sunday Night | 67°F | Slight Chance Showers And Thunderstorms | 15 mph E | 23% |
| Monday | 88°F | Slight Chance Showers And Thunderstorms then Partly Sunny | 15 mph ENE | 23% |
| Monday Night | 66°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph ENE | 17% |
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 Aug 4, 2026.