Flandreau, SD Weather & Growing Conditions
Tonight
58°F
Areas Of Fog
Areas of fog before 1am, then areas of fog and a slight chance of rain showers. Cloudy, with a low around 58. Northeast wind 5 to 10 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 58°F | Areas Of Fog | 5 to 10 mph NE | 17% |
| Saturday | 65°F | Areas Of Fog then Cloudy | 10 to 15 mph NNE | 10% |
| Saturday Night | 53°F | Mostly Cloudy | 10 to 15 mph NNE | 2% |
| Sunday | 64°F | Mostly Cloudy then Slight Chance Rain Showers | 10 to 15 mph NE | 19% |
| Sunday Night | 50°F | Chance Rain Showers | 10 to 15 mph ENE | 46% |
| Monday | 60°F | Chance Rain Showers | 10 mph ENE | 46% |
| Monday Night | 45°F | Mostly Cloudy | 5 to 10 mph E | 14% |
| Tuesday | 64°F | Partly Sunny | 5 to 10 mph ESE | 3% |
| Tuesday Night | 46°F | Partly Cloudy | 5 to 10 mph SE | 2% |
| Wednesday | 66°F | Partly Sunny | 5 to 15 mph SSE | 8% |
| Wednesday Night | 50°F | Chance Rain Showers | 5 to 10 mph SSE | 32% |
| Thursday | 68°F | Chance Rain Showers | 5 to 10 mph SSE | 32% |
| Thursday Night | 52°F | Mostly Cloudy | 5 mph SSE | 13% |
| Friday | 70°F | Partly Sunny | 5 to 10 mph SE | 13% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Flandreau, SD
Last spring frost
May 5
First fall frost
Oct 1
Growing season
148 days
Hardiness zone
4b
Explore more for Flandreau, SD: full frost dates · planting calendar · South Dakota frost dates
Climate data from the nearest NOAA station, Flandreau, Sd (0.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.