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.

Fair

59°F

15°C

Humidity 46%
Wind Speed N 16 G 25 mph
Barometer 29.72 in
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Last update 26 Mar 3:35 am CDT
Extended Forecast for

Fort Thompson SD

  • Overnight

    Overnight: Mostly cloudy, with a low around 41. Breezy, with a north wind 22 to 24 mph, with gusts as high as 43 mph.

    Low: 41 °F

    Mostly Cloudy
    and Breezy

  • Thursday

    Thursday: Mostly cloudy, with a temperature falling to around 41 by 9am. Breezy, with a north northeast wind 18 to 25 mph, with gusts as high as 40 mph.

    High: 48 °F⇓

    Mostly Cloudy
    and Breezy

  • Thursday Night

    Thursday Night: Cloudy during the early evening, then gradual clearing, with a low around 23. North wind 6 to 14 mph becoming west northwest after midnight.

    Low: 23 °F

    Gradual
    Clearing

  • Friday

    Friday: Sunny, with a high near 47. Northwest wind 9 to 14 mph.

    High: 47 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 29. West wind 6 to 16 mph becoming south southeast in the evening. Winds could gust as high as 25 mph.

    Low: 29 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 67. Breezy, with a south wind 14 to 20 mph, with gusts as high as 28 mph.

    High: 67 °F

    Mostly Sunny
    and Breezy
    then Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 37. Southeast wind 8 to 10 mph.

    Low: 37 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 75. East southeast wind 7 to 9 mph becoming north northwest in the afternoon.

    High: 75 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 38. Northeast wind around 10 mph.

    Low: 38 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 41. Breezy, with a north wind 22 to 24 mph, with gusts as high as 43 mph.
Thursday
Mostly cloudy, with a temperature falling to around 41 by 9am. Breezy, with a north northeast wind 18 to 25 mph, with gusts as high as 40 mph.
Thursday Night
Cloudy during the early evening, then gradual clearing, with a low around 23. North wind 6 to 14 mph becoming west northwest after midnight.
Friday
Sunny, with a high near 47. Northwest wind 9 to 14 mph.
Friday Night
Mostly clear, with a low around 29. West wind 6 to 16 mph becoming south southeast in the evening. Winds could gust as high as 25 mph.
Saturday
Mostly sunny, with a high near 67. Breezy, with a south wind 14 to 20 mph, with gusts as high as 28 mph.
Saturday Night
Partly cloudy, with a low around 37. Southeast wind 8 to 10 mph.
Sunday
Sunny, with a high near 75. East southeast wind 7 to 9 mph becoming north northwest in the afternoon.
Sunday Night
Partly cloudy, with a low around 38. Northeast wind around 10 mph.
Monday
Partly sunny, with a high near 67.
Monday Night
Mostly cloudy, with a low around 41.
Tuesday
Partly sunny, with a high near 72.
Tuesday Night
A chance of rain and snow. Mostly cloudy, with a low around 34. Chance of precipitation is 30%.
Wednesday
A chance of rain and snow. Mostly cloudy, with a high near 52. 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:
3:36 am CDT Mar 26, 2026
Forecast Valid:
3am CDT Mar 26, 2026-6pm CDT Apr 1, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation