National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Chamberlain, Chamberlain Municipal Airport (K9V9)

Lat: 43.77°NLon: 99.32°WElev: 1693ft.

Overcast

29°F

-2°C

Humidity 66%
Wind Speed N 5 mph
Barometer 30.45 in
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill24°F (-4°C)
Last update 26 Mar 9:35 pm CDT
Extended Forecast for

Fort Thompson SD

  • Tonight

    Tonight: Partly cloudy, with a low around 24. Calm wind becoming west 5 to 7 mph after midnight.

    Low: 24 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 47. Northwest wind 9 to 15 mph, with gusts as high as 24 mph.

    High: 47 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 29. West northwest wind 5 to 10 mph becoming south southeast 13 to 18 mph after midnight. Winds could gust as high as 28 mph.

    Low: 29 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 69. Breezy, with a south southwest wind 16 to 25 mph, with gusts as high as 36 mph.

    High: 69 °F

    Sunny and
    Breezy

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 35. South southeast wind around 8 mph becoming east after midnight.

    Low: 35 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 73. East northeast wind 7 to 9 mph.

    High: 73 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 37. East northeast wind around 10 mph.

    Low: 37 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 71. East northeast wind 11 to 14 mph.

    High: 71 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 44. East southeast wind around 14 mph.

    Low: 44 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 24. Calm wind becoming west 5 to 7 mph after midnight.
Friday
Sunny, with a high near 47. Northwest wind 9 to 15 mph, with gusts as high as 24 mph.
Friday Night
Mostly clear, with a low around 29. West northwest wind 5 to 10 mph becoming south southeast 13 to 18 mph after midnight. Winds could gust as high as 28 mph.
Saturday
Sunny, with a high near 69. Breezy, with a south southwest wind 16 to 25 mph, with gusts as high as 36 mph.
Saturday Night
Partly cloudy, with a low around 35. South southeast wind around 8 mph becoming east after midnight.
Sunday
Sunny, with a high near 73. East northeast wind 7 to 9 mph.
Sunday Night
Partly cloudy, with a low around 37. East northeast wind around 10 mph.
Monday
Mostly sunny, with a high near 71. East northeast wind 11 to 14 mph.
Monday Night
Mostly cloudy, with a low around 44. East southeast wind around 14 mph.
Tuesday
Mostly cloudy, with a high near 69.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 31. Chance of precipitation is 30%.
Wednesday
A chance of rain. Partly sunny, with a high near 52. Chance of precipitation is 30%.
Wednesday Night
A chance of rain and snow. Mostly cloudy, with a low around 29. Chance of precipitation is 30%.
Thursday
A chance of rain and snow. Partly sunny, with a high near 53. Breezy. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Fort Thompson SD
 44.05°N 99.4°W (Elev. 1447 ft)
Last Update:
9:36 pm CDT Mar 26, 2026
Forecast Valid:
9pm CDT Mar 26, 2026-6pm CDT Apr 2, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation