Flandreau, SD Weather & Growing Conditions
Overnight
38°F
Rain Showers Likely
Rain showers likely. Cloudy. Low around 38, with temperatures rising to around 41 overnight. North northwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 38°F | Rain Showers Likely | 15 mph NNW | 59% |
| Wednesday | 43°F | Rain Showers | 15 mph NW | 80% |
| Wednesday Night | 35°F | Rain Showers Likely then Cloudy | 15 mph NNW | 62% |
| Thursday | 43°F | Mostly Cloudy | 10 to 15 mph N | 0% |
| Thursday Night | 29°F | Mostly Cloudy | 0 to 10 mph N | 0% |
| Friday | 43°F | Mostly Sunny | 0 to 5 mph E | 0% |
| Friday Night | 28°F | Partly Cloudy | 0 mph | 0% |
| Saturday | 51°F | Mostly Sunny | 0 to 10 mph SW | 1% |
| Saturday Night | 33°F | Mostly Clear | 5 mph W | 0% |
| Sunday | 54°F | Sunny | 5 to 10 mph WSW | 0% |
| Sunday Night | 36°F | Mostly Clear | 5 mph SSW | 0% |
| Monday | 59°F | Mostly Sunny | 5 to 10 mph WSW | 0% |
| Monday Night | 35°F | Mostly Clear | 0 to 5 mph NW | 0% |
| Tuesday | 56°F | Mostly Sunny | 0 to 5 mph W | 1% |
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 Nov 4, 2026.