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.

Partly Cloudy

63°F

17°C

Humidity 81%
Wind Speed SE 9 mph
Barometer 30.05 in
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 30 Sep 5:15 am CDT
Extended Forecast for

Fort Thompson SD

  • Today

    Today: Mostly cloudy, then gradually becoming sunny, with a high near 86. Breezy, with a south southeast wind 6 to 11 mph increasing to 18 to 23 mph in the afternoon. Winds could gust as high as 33 mph.

    High: 86 °F

    Partly Sunny
    then Mostly
    Sunny and
    Breezy

  • Tonight

    Tonight: Mostly clear, with a low around 62. South southeast wind 15 to 18 mph, with gusts as high as 30 mph.

    Low: 62 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 85. Breezy, with a south wind 16 to 20 mph, with gusts as high as 30 mph.

    High: 85 °F

    Mostly Sunny
    and Breezy

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 58. South wind 8 to 14 mph, with gusts as high as 22 mph.

    Low: 58 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 89. South wind 6 to 14 mph, with gusts as high as 22 mph.

    High: 89 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 62. South southeast wind 10 to 13 mph, with gusts as high as 21 mph.

    Low: 62 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 89. South wind 9 to 15 mph, with gusts as high as 24 mph.

    High: 89 °F

    Sunny

  • Friday Night

    Friday Night: A slight chance of showers after 1am. Partly cloudy, with a low around 61. South wind 10 to 13 mph becoming east after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 20%.

    Low: 61 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Saturday

    Saturday: A slight chance of showers before 1pm. Mostly sunny, with a high near 81. East wind 9 to 13 mph becoming south in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 20%.

    High: 81 °F

    Slight Chance
    Showers

Detailed Forecast

Today
Mostly cloudy, then gradually becoming sunny, with a high near 86. Breezy, with a south southeast wind 6 to 11 mph increasing to 18 to 23 mph in the afternoon. Winds could gust as high as 33 mph.
Tonight
Mostly clear, with a low around 62. South southeast wind 15 to 18 mph, with gusts as high as 30 mph.
Wednesday
Mostly sunny, with a high near 85. Breezy, with a south wind 16 to 20 mph, with gusts as high as 30 mph.
Wednesday Night
Mostly clear, with a low around 58. South wind 8 to 14 mph, with gusts as high as 22 mph.
Thursday
Sunny, with a high near 89. South wind 6 to 14 mph, with gusts as high as 22 mph.
Thursday Night
Mostly clear, with a low around 62. South southeast wind 10 to 13 mph, with gusts as high as 21 mph.
Friday
Sunny, with a high near 89. South wind 9 to 15 mph, with gusts as high as 24 mph.
Friday Night
A slight chance of showers after 1am. Partly cloudy, with a low around 61. South wind 10 to 13 mph becoming east after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 20%.
Saturday
A slight chance of showers before 1pm. Mostly sunny, with a high near 81. East wind 9 to 13 mph becoming south in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 20%.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 56. Chance of precipitation is 40%.
Sunday
A chance of showers. Partly sunny, with a high near 69. Chance of precipitation is 30%.
Sunday Night
A slight chance of showers. Partly cloudy, with a low around 46. Chance of precipitation is 20%.
Monday
A slight chance of showers. Mostly sunny, with a high near 64. 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:
5:15 am CDT Sep 30, 2025
Forecast Valid:
5am CDT Sep 30, 2025-6pm CDT Oct 6, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation