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

53°F

12°C

Humidity 44%
Wind Speed SE 7 mph
Barometer 29.93 in
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Wind Chill51°F (11°C)
Last update 24 Mar 8:15 pm CDT
Extended Forecast for

Fort Thompson SD

  • Tonight

    Tonight: Mostly cloudy, with a low around 40. Southeast wind 3 to 8 mph.

    Low: 40 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 77. Light and variable wind becoming west northwest 5 to 10 mph in the afternoon.

    High: 77 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 42. Northwest wind 5 to 14 mph becoming east southeast in the evening.

    Low: 42 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 54. Breezy, with a north wind 16 to 23 mph.

    High: 54 °F

    Partly Sunny
    and Breezy

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 22. North northeast wind 12 to 17 mph decreasing to 6 to 11 mph after midnight.

    Low: 22 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 51. Northwest wind 5 to 9 mph.

    High: 51 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 31. Northwest wind 8 to 11 mph becoming southeast in the evening.

    Low: 31 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 65. South wind 10 to 15 mph.

    High: 65 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 37. Southeast wind 10 to 13 mph.

    Low: 37 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 40. Southeast wind 3 to 8 mph.
Wednesday
Sunny, with a high near 77. Light and variable wind becoming west northwest 5 to 10 mph in the afternoon.
Wednesday Night
Mostly cloudy, with a low around 42. Northwest wind 5 to 14 mph becoming east southeast in the evening.
Thursday
Partly sunny, with a high near 54. Breezy, with a north wind 16 to 23 mph.
Thursday Night
Partly cloudy, with a low around 22. North northeast wind 12 to 17 mph decreasing to 6 to 11 mph after midnight.
Friday
Sunny, with a high near 51. Northwest wind 5 to 9 mph.
Friday Night
Mostly clear, with a low around 31. Northwest wind 8 to 11 mph becoming southeast in the evening.
Saturday
Mostly sunny, with a high near 65. South wind 10 to 15 mph.
Saturday Night
Partly cloudy, with a low around 37. Southeast wind 10 to 13 mph.
Sunday
Mostly sunny, with a high near 74.
Sunday Night
Partly cloudy, with a low around 41.
Monday
Partly sunny, with a high near 74.
Monday Night
Partly cloudy, with a low around 42.
Tuesday
Partly sunny, with a high near 67.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Fort Thompson SD
 44.05°N 99.4°W (Elev. 1447 ft)
Last Update:
7:36 pm CDT Mar 24, 2026
Forecast Valid:
8pm CDT Mar 24, 2026-6pm CDT Mar 31, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation