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

41°F

5°C

Humidity 70%
Wind Speed N 13 G 20 mph
Barometer 30.42 in
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Wind Chill34°F (1°C)
Last update 5 Apr 10:15 pm CDT
Extended Forecast for

Fort Thompson SD

  • Tonight

    Tonight: Mostly cloudy, with a low around 28. North northeast wind 6 to 13 mph.

    Low: 28 °F

    Mostly Cloudy

  • Monday

    Monday: A chance of snow, mainly before 10am. Mostly cloudy, with a high near 40. Northeast wind 7 to 11 mph. Chance of precipitation is 30%.

    High: 40 °F

    Chance Snow

  • Monday Night

    Monday Night: Cloudy, with a low around 22. East northeast wind 10 to 13 mph.

    Low: 22 °F

    Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 44. Breezy, with a south southeast wind 14 to 23 mph, with gusts as high as 33 mph.

    High: 44 °F

    Mostly Cloudy
    and Breezy

  • Tuesday Night

    Tuesday Night: A slight chance of rain after 1am. Mostly cloudy, with a low around 34. Breezy, with a south southeast wind 14 to 20 mph, with gusts as high as 29 mph. Chance of precipitation is 20%.

    Low: 34 °F

    Breezy.
    Mostly Cloudy
    then Slight
    Chance Rain

  • Wednesday

    Wednesday: Mostly sunny, with a high near 58. Breezy, with a west northwest wind 13 to 22 mph, with gusts as high as 30 mph.

    High: 58 °F

    Mostly Sunny
    and Breezy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 29. Blustery, with a west northwest wind 10 to 20 mph.

    Low: 29 °F

    Partly Cloudy
    and Blustery
    then Partly
    Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 52. Northwest wind 8 to 10 mph.

    High: 52 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A chance of rain after 1am. Partly cloudy, with a low around 29. North wind 7 to 9 mph becoming east southeast after midnight. Chance of precipitation is 30%.

    Low: 29 °F

    Partly Cloudy
    then Chance
    Rain

Detailed Forecast

Tonight
Mostly cloudy, with a low around 28. North northeast wind 6 to 13 mph.
Monday
A chance of snow, mainly before 10am. Mostly cloudy, with a high near 40. Northeast wind 7 to 11 mph. Chance of precipitation is 30%.
Monday Night
Cloudy, with a low around 22. East northeast wind 10 to 13 mph.
Tuesday
Mostly cloudy, with a high near 44. Breezy, with a south southeast wind 14 to 23 mph, with gusts as high as 33 mph.
Tuesday Night
A slight chance of rain after 1am. Mostly cloudy, with a low around 34. Breezy, with a south southeast wind 14 to 20 mph, with gusts as high as 29 mph. Chance of precipitation is 20%.
Wednesday
Mostly sunny, with a high near 58. Breezy, with a west northwest wind 13 to 22 mph, with gusts as high as 30 mph.
Wednesday Night
Partly cloudy, with a low around 29. Blustery, with a west northwest wind 10 to 20 mph.
Thursday
Mostly sunny, with a high near 52. Northwest wind 8 to 10 mph.
Thursday Night
A chance of rain after 1am. Partly cloudy, with a low around 29. North wind 7 to 9 mph becoming east southeast after midnight. Chance of precipitation is 30%.
Friday
A chance of rain. Mostly sunny, with a high near 58. Chance of precipitation is 30%.
Friday Night
A chance of rain. Mostly cloudy, with a low around 40. Chance of precipitation is 30%.
Saturday
A chance of rain. Partly sunny, with a high near 66. Chance of precipitation is 30%.
Saturday Night
A chance of rain. Mostly cloudy, with a low around 47. Chance of precipitation is 40%.
Sunday
A chance of rain. Partly sunny, with a high near 72. Chance of precipitation is 50%.
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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 Apr 5, 2026
Forecast Valid:
10pm CDT Apr 5, 2026-6pm CDT Apr 12, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation