Brant Lake South, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Brant Lake South, a community in Lake County, South Dakota.
Overnight
37°F
Chance Rain Showers
A chance of rain showers. Cloudy. Low around 37, with temperatures rising to around 41 overnight. Northwest wind around 20 mph, with gusts as high as 30 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Brant Lake South
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 37°F | Chance Rain Showers | 20 mph NW | 38% |
| Wednesday | 43°F | Rain Showers | 20 mph NW | 77% |
| Wednesday Night | 35°F | Chance Rain Showers then Cloudy | 15 mph NW | 50% |
| Thursday | 44°F | Mostly Cloudy | 10 to 15 mph N | 0% |
| Thursday Night | 29°F | Mostly Cloudy | 0 to 10 mph NNE | 0% |
| Friday | 43°F | Mostly Sunny | 0 to 5 mph E | 0% |
| Friday Night | 28°F | Partly Cloudy | 5 mph S | 0% |
| Saturday | 52°F | Mostly Sunny | 5 to 10 mph SW | 0% |
| Saturday Night | 33°F | Mostly Clear | 5 mph W | 0% |
| Sunday | 54°F | Sunny | 5 to 10 mph WSW | 0% |
| Sunday Night | 37°F | Mostly Clear | 5 mph SSW | 0% |
| Monday | 59°F | Mostly Sunny | 5 to 10 mph W | 0% |
| Monday Night | 36°F | Mostly Clear | 5 mph NW | 0% |
| Tuesday | 56°F | Mostly Sunny | 5 to 10 mph W | 1% |
Forecast source: National Weather Service (api.weather.gov) for Brant Lake South (43.911, -96.941). Updated through the day.
Growing snapshot for Brant Lake South
Last spring frost
May 2
First fall frost
Oct 5
Growing season
156 days
Hardiness zone
4b
More local growing data for Brant Lake South: nearby ZIP 57016 weather · frost dates · planting calendar · South Dakota frost dates
Nearby towns & communities
Brant Lake
Chester
Graceville Colony
Lake Madison
Madison
Nunda
Ramona
Rustic Acres Colony
Shannon Colony
Wentworth
Winfred
Climate data from the nearest NOAA station, Wentworth 2.5 Wnw, Sd (9.3 mi from Brant Lake South). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.