Millbrook Colony, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Millbrook Colony, a community in Hanson County, South Dakota.
Tonight
56°F
Chance Rain Showers then Cloudy
A chance of rain showers between 8pm and 10pm. Cloudy, with a low around 56. Northeast wind 5 to 10 mph.
7-day forecast for Millbrook Colony
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 56°F | Chance Rain Showers then Cloudy | 5 to 10 mph NE | 8% |
| Sunday | 65°F | Cloudy then Chance Rain Showers | 10 to 15 mph ENE | 31% |
| Sunday Night | 52°F | Rain Showers | 10 mph ENE | 94% |
| Monday | 60°F | Rain Showers | 10 mph ENE | 94% |
| Monday Night | 45°F | Mostly Cloudy | 5 to 10 mph E | 6% |
| Tuesday | 65°F | Partly Sunny | 5 to 10 mph ESE | 2% |
| Tuesday Night | 48°F | Partly Cloudy | 10 to 15 mph SE | 4% |
| Wednesday | 67°F | Partly Sunny | 15 mph SE | 12% |
| Wednesday Night | 53°F | Chance Showers And Thunderstorms | 15 mph SE | 53% |
| Thursday | 72°F | Chance Showers And Thunderstorms | 10 to 15 mph SSE | 53% |
| Thursday Night | 55°F | Mostly Cloudy | 10 mph SE | 9% |
| Friday | 73°F | Mostly Cloudy | 10 to 15 mph SE | 9% |
| Friday Night | 58°F | Mostly Cloudy then Chance Rain Showers | 10 to 15 mph SE | 25% |
| Saturday | 73°F | Chance Rain Showers | 15 mph SSE | 38% |
Forecast source: National Weather Service (api.weather.gov) for Millbrook Colony (43.668, -97.871). Updated through the day.
Growing snapshot for Millbrook Colony
Last spring frost
May 8
First fall frost
Sep 29
Growing season
143 days
Hardiness zone
5a
More local growing data for Millbrook Colony: nearby ZIP 57311 weather · frost dates · planting calendar · South Dakota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Alexandria, Sd (1.7 mi from Millbrook Colony). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.