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.
Today
71°F
Isolated Rain Showers
Isolated rain showers between 10am and 3pm. Partly sunny, with a high near 71. North northwest wind around 10 mph. Chance of precipitation is 20%.
7-day forecast for Brant Lake South
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 71°F | Isolated Rain Showers | 10 mph NNW | 20% |
| Tonight | 53°F | Partly Cloudy | 0 to 5 mph WNW | 1% |
| Wednesday | 77°F | Sunny | 0 to 5 mph S | 0% |
| Wednesday Night | 56°F | Mostly Clear | 5 to 10 mph SSW | 0% |
| Thursday | 82°F | Sunny | 10 to 15 mph SSW | 1% |
| Thursday Night | 62°F | Mostly Clear | 10 to 15 mph SSW | 4% |
| Friday | 85°F | Sunny | 10 to 15 mph SSW | 11% |
| Friday Night | 63°F | Mostly Clear | 5 to 10 mph S | 12% |
| Saturday | 87°F | Sunny | 5 to 15 mph S | 5% |
| Saturday Night | 66°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph ESE | 21% |
| Sunday | 85°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 15 mph ESE | 15% |
| Sunday Night | 65°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph E | 23% |
| Monday | 84°F | Slight Chance Showers And Thunderstorms then Partly Sunny | 15 mph ENE | 23% |
| Monday Night | 64°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph ENE | 17% |
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 Aug 4, 2026.