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.
This Afternoon
47°F
Slight Chance Rain Showers
A slight chance of rain showers. Cloudy. High near 47, with temperatures falling to around 43 in the afternoon. North northwest wind around 20 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.
7-day forecast for Grass Ranch Colony
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 47°F | Slight Chance Rain Showers | 20 mph NNW | 17% |
| Tonight | 35°F | Cloudy then Chance Rain Showers | 15 mph NW | 28% |
| Wednesday | 46°F | Chance Rain Showers | 15 to 20 mph NW | 48% |
| Wednesday Night | 33°F | Slight Chance Rain Showers then Mostly Cloudy | 10 to 15 mph NW | 16% |
| Thursday | 49°F | Mostly Sunny | 5 to 15 mph NNW | 2% |
| Thursday Night | 27°F | Partly Cloudy | 0 to 5 mph ENE | 0% |
| Friday | 49°F | Mostly Sunny | 0 to 5 mph SSE | 0% |
| Friday Night | 29°F | Partly Cloudy | 5 mph SSW | 0% |
| Saturday | 59°F | Mostly Sunny | 5 to 10 mph W | 5% |
| Saturday Night | 33°F | Mostly Clear | 5 mph W | 3% |
| Sunday | 61°F | Sunny | 5 to 10 mph SW | 0% |
| Sunday Night | 38°F | Mostly Clear | 10 mph SSW | 0% |
| Monday | 61°F | Sunny | 10 to 15 mph NW | 0% |
| Monday Night | 35°F | Partly Cloudy | 5 mph WNW | 0% |
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 Nov 4, 2026.