Brant Lake, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Brant Lake, a city in Lake County, South Dakota.
Tonight
38°F
Rain Showers
Rain showers. Cloudy. Low around 38, with temperatures rising to around 41 overnight. North northwest wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Brant Lake
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 38°F | Rain Showers | 15 to 20 mph NNW | 91% |
| Wednesday | 44°F | Rain Showers | 15 to 20 mph NW | 90% |
| Wednesday Night | 36°F | Rain Showers Likely then Cloudy | 15 mph NNW | 63% |
| Thursday | 45°F | Partly Sunny | 10 to 15 mph N | 8% |
| Thursday Night | 30°F | Mostly Cloudy | 0 to 10 mph NNE | 0% |
| Friday | 45°F | Partly Sunny | 0 to 5 mph SE | 0% |
| Friday Night | 30°F | Partly Cloudy | 5 mph S | 0% |
| Saturday | 54°F | Mostly Sunny | 5 to 10 mph WSW | 3% |
| Saturday Night | 34°F | Mostly Clear | 5 to 10 mph WNW | 4% |
| Sunday | 56°F | Sunny | 5 to 10 mph WSW | 2% |
| Sunday Night | 37°F | Mostly Clear | 5 to 10 mph SSW | 0% |
| Monday | 59°F | Sunny | 10 to 15 mph W | 0% |
| Monday Night | 37°F | Mostly Clear | 5 to 10 mph NW | 0% |
| Tuesday | 56°F | Mostly Sunny | 5 to 10 mph W | 0% |
Forecast source: National Weather Service (api.weather.gov) for Brant Lake (43.931, -96.944). Updated through the day.
Growing snapshot for Brant Lake
Last spring frost
May 2
First fall frost
Oct 5
Growing season
156 days
Hardiness zone
4b
More local growing data for Brant Lake: nearby ZIP 57016 weather · frost dates · planting calendar · South Dakota frost dates
Nearby towns & communities
Brant Lake South
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). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.