National Weather Service Forecast for: Flandreau SD
Issued by: National Weather Service Sioux Falls, SD
Updated: 11:28 am CDT May 4, 2026
 
This
Afternoon
This Afternoon: A chance of sprinkles between 1pm and 4pm. Mostly cloudy, with a high near 63. Breezy, with a northwest wind 20 to 25 mph, with gusts as high as 35 mph.
Chance
Sprinkles and
Breezy
 Tonight

Tonight: Widespread frost after 4am. Otherwise, cloudy during the early evening, then gradual clearing, with a low around 31. Blustery, with a north northwest wind 15 to 20 mph decreasing to 5 to 10 mph after midnight. Winds could gust as high as 30 mph.
Partly Cloudy
and Blustery
then Frost
 Tuesday

Tuesday: Mostly sunny, with a high near 52. Northwest wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.
Mostly Sunny

 Tuesday
Night
Tuesday Night: Widespread frost after 4am. Otherwise, mostly cloudy, with a low around 26. North wind 10 to 15 mph decreasing to 5 to 10 mph after midnight. Winds could gust as high as 20 mph.
Mostly Cloudy
then Frost
 Wednesday

Wednesday: Widespread frost before 8am. Otherwise, mostly sunny, with a high near 52. Light north wind becoming northwest 10 to 15 mph in the morning. Winds could gust as high as 20 mph.
Frost then
Partly Sunny
 Wednesday
Night
Wednesday Night: Widespread frost after 4am. Otherwise, partly cloudy, with a low around 31. Northwest wind 5 to 10 mph becoming light and variable in the evening.
Mostly Cloudy
then Frost
 Thursday

Thursday: Widespread frost before 8am. Otherwise, mostly sunny, with a high near 62.
Frost then
Mostly Sunny
 Thursday
Night
Thursday Night: Partly cloudy, with a low around 33.
Partly Cloudy

 Friday

Friday: Mostly sunny, with a high near 64.
Mostly Sunny
Hi 63 °F Lo 31 °F Hi 52 °F Lo 26 °F Hi 52 °F Lo 31 °F Hi 62 °F Lo 33 °F Hi 64 °F

Hazardous Weather Outlook
 

This Afternoon
 
 A chance of sprinkles between 1pm and 4pm. Mostly cloudy, with a high near 63. Breezy, with a northwest wind 20 to 25 mph, with gusts as high as 35 mph.
Tonight
 
 Widespread frost after 4am. Otherwise, cloudy during the early evening, then gradual clearing, with a low around 31. Blustery, with a north northwest wind 15 to 20 mph decreasing to 5 to 10 mph after midnight. Winds could gust as high as 30 mph.
Tuesday
 
 Mostly sunny, with a high near 52. Northwest wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.
Tuesday Night
 
 Widespread frost after 4am. Otherwise, mostly cloudy, with a low around 26. North wind 10 to 15 mph decreasing to 5 to 10 mph after midnight. Winds could gust as high as 20 mph.
Wednesday
 
 Widespread frost before 8am. Otherwise, mostly sunny, with a high near 52. Light north wind becoming northwest 10 to 15 mph in the morning. Winds could gust as high as 20 mph.
Wednesday Night
 
 Widespread frost after 4am. Otherwise, partly cloudy, with a low around 31. Northwest wind 5 to 10 mph becoming light and variable in the evening.
Thursday
 
 Widespread frost before 8am. Otherwise, mostly sunny, with a high near 62.
Thursday Night
 
 Partly cloudy, with a low around 33.
Friday
 
 Mostly sunny, with a high near 64.
Friday Night
 
 Mostly clear, with a low around 38.
Saturday
 
 Mostly sunny, with a high near 69.
Saturday Night
 
 Mostly cloudy, with a low around 40.
Sunday
 
 Mostly sunny, with a high near 68.

 

Forecast from NOAA-NWS for Flandreau SD.