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

74°F

23°C

Humidity 75%
Wind Speed NW 7 mph
Barometer 29.88 in
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 5 Jun 11:15 am CDT
Extended Forecast for

Fort Thompson SD

  • Today

    Today: Sunny, with a high near 84. West northwest wind 7 to 13 mph.

    High: 84 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 57. West northwest wind around 5 mph becoming light and variable.

    Low: 57 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 93. Breezy, with a southeast wind 7 to 12 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 30 mph.

    High: 93 °F

    Sunny then
    Sunny and
    Breezy

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 67. Southeast wind 16 to 18 mph, with gusts as high as 26 mph.

    Low: 67 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny and hot, with a high near 96. Breezy, with a south southeast wind 15 to 20 mph increasing to 21 to 26 mph in the afternoon. Winds could gust as high as 36 mph.

    High: 96 °F

    Hot and
    Breezy

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 64. Breezy, with a south southeast wind 13 to 22 mph, with gusts as high as 31 mph. Chance of precipitation is 30%.

    Low: 64 °F

    Partly Cloudy
    and Breezy
    then Chance
    T-storms

  • Monday

    Monday: Mostly sunny, with a high near 88. South southwest wind 11 to 16 mph becoming north northwest in the afternoon.

    High: 88 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A slight chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 59. East northeast wind 7 to 10 mph becoming north in the evening. Chance of precipitation is 20%.

    Low: 59 °F

    Slight Chance
    T-storms

  • Tuesday

    Tuesday: Mostly sunny and hot, with a high near 96. Breezy, with an east southeast wind 9 to 14 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 31 mph.

    High: 96 °F

    Partly Sunny
    then Mostly
    Sunny and
    Breezy

Detailed Forecast

Today
Sunny, with a high near 84. West northwest wind 7 to 13 mph.
Tonight
Mostly clear, with a low around 57. West northwest wind around 5 mph becoming light and variable.
Saturday
Sunny and hot, with a high near 93. Breezy, with a southeast wind 7 to 12 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 30 mph.
Saturday Night
Mostly clear, with a low around 67. Southeast wind 16 to 18 mph, with gusts as high as 26 mph.
Sunday
Mostly sunny and hot, with a high near 96. Breezy, with a south southeast wind 15 to 20 mph increasing to 21 to 26 mph in the afternoon. Winds could gust as high as 36 mph.
Sunday Night
A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 64. Breezy, with a south southeast wind 13 to 22 mph, with gusts as high as 31 mph. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 88. South southwest wind 11 to 16 mph becoming north northwest in the afternoon.
Monday Night
A slight chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 59. East northeast wind 7 to 10 mph becoming north in the evening. Chance of precipitation is 20%.
Tuesday
Mostly sunny and hot, with a high near 96. Breezy, with an east southeast wind 9 to 14 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 31 mph.
Tuesday Night
A chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 68. Breezy. Chance of precipitation is 30%.
Wednesday
Mostly sunny and hot, with a high near 102.
Wednesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 67. Chance of precipitation is 30%.
Thursday
A slight chance of showers. Mostly sunny and hot, with a high near 98. Breezy. Chance of precipitation is 20%.
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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:
11:36 am CDT Jun 5, 2026
Forecast Valid:
11am CDT Jun 5, 2026-6pm CDT Jun 11, 2026
 
Forecast Discussion
 
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Additional Resources

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Link to Local Radar Data Link to Satellite Data

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