Twin Brooks, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Twin Brooks, a town in Grant County, South Dakota.
Tonight
39°F
Light Rain
Rain and patchy fog. Cloudy, with a low around 39. North northwest wind 15 to 20 mph, with gusts as high as 31 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Twin Brooks
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 39°F | Light Rain | 15 to 20 mph NNW | 89% |
| Wednesday | 44°F | Light Rain | 20 mph NNW | 90% |
| Wednesday Night | 34°F | Chance Light Rain then Mostly Cloudy | 16 mph NNW | 41% |
| Thursday | 41°F | Patchy Fog then Partly Sunny | 9 to 16 mph N | 5% |
| Thursday Night | 30°F | Mostly Cloudy | 2 to 8 mph N | 0% |
| Friday | 44°F | Partly Sunny | 5 mph SW | 0% |
| Friday Night | 31°F | Partly Cloudy | 3 to 7 mph SSW | 0% |
| Saturday | 55°F | Mostly Sunny | 7 to 12 mph WSW | 2% |
| Saturday Night | 37°F | Partly Cloudy | 10 mph W | 4% |
| Sunday | 56°F | Sunny | 8 mph WSW | 2% |
| Sunday Night | 40°F | Partly Cloudy | 7 to 12 mph SW | 0% |
| Monday | 58°F | Mostly Sunny | 9 to 14 mph WNW | 0% |
| Monday Night | 38°F | Mostly Clear | 6 to 9 mph WNW | 0% |
| Tuesday | 54°F | Mostly Sunny | 7 mph W | 0% |
Forecast source: National Weather Service (api.weather.gov) for Twin Brooks (45.209, -96.786). Updated through the day.
Growing snapshot for Twin Brooks
Last spring frost
May 2
First fall frost
Oct 4
Growing season
153 days
Hardiness zone
4b
More local growing data for Twin Brooks: nearby ZIP 57269 weather · frost dates · planting calendar · South Dakota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Milbank 4 Nw, Sd (7.6 mi from Twin Brooks). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.