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

49°F

9°C

Humidity 81%
Wind Speed SE 5 mph
Barometer 30.36 in
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Wind Chill47°F (8°C)
Last update 2 Oct 8:15 am CDT
Extended Forecast for

Fort Thompson SD

  • Today

    Today: A slight chance of showers before 11am, then a chance of sprinkles between 11am and 1pm. Mostly cloudy, then gradually becoming sunny, with a high near 66. Breezy, with a south southeast wind 5 to 10 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 20%.

    High: 66 °F

    Slight Chance
    Showers then
    Breezy

  • Tonight

    Tonight: Mostly clear, with a low around 52. South southeast wind 13 to 17 mph, with gusts as high as 29 mph.

    Low: 52 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 75. South southeast wind 8 to 14 mph becoming north northwest in the afternoon. Winds could gust as high as 23 mph.

    High: 75 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 48. North northwest wind 5 to 8 mph.

    Low: 48 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 67. Calm wind becoming east southeast around 5 mph in the afternoon.

    High: 67 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 49. East southeast wind 5 to 9 mph.

    Low: 49 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 73. Breezy, with a south southeast wind 13 to 21 mph, with gusts as high as 30 mph.

    High: 73 °F

    Sunny then
    Sunny and
    Breezy

  • Monday Night

    Monday Night: Mostly clear, with a low around 56. South southeast wind 7 to 16 mph, with gusts as high as 28 mph.

    Low: 56 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 80. South southeast wind 5 to 8 mph becoming west northwest in the afternoon.

    High: 80 °F

    Mostly Sunny

Detailed Forecast

Today
A slight chance of showers before 11am, then a chance of sprinkles between 11am and 1pm. Mostly cloudy, then gradually becoming sunny, with a high near 66. Breezy, with a south southeast wind 5 to 10 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 20%.
Tonight
Mostly clear, with a low around 52. South southeast wind 13 to 17 mph, with gusts as high as 29 mph.
Saturday
Sunny, with a high near 75. South southeast wind 8 to 14 mph becoming north northwest in the afternoon. Winds could gust as high as 23 mph.
Saturday Night
Mostly clear, with a low around 48. North northwest wind 5 to 8 mph.
Sunday
Sunny, with a high near 67. Calm wind becoming east southeast around 5 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 49. East southeast wind 5 to 9 mph.
Monday
Sunny, with a high near 73. Breezy, with a south southeast wind 13 to 21 mph, with gusts as high as 30 mph.
Monday Night
Mostly clear, with a low around 56. South southeast wind 7 to 16 mph, with gusts as high as 28 mph.
Tuesday
Mostly sunny, with a high near 80. South southeast wind 5 to 8 mph becoming west northwest in the afternoon.
Tuesday Night
Mostly clear, with a low around 56.
Wednesday
Mostly sunny, with a high near 74.
Wednesday Night
Mostly clear, with a low around 54.
Thursday
Sunny, with a high near 73.
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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:
8:21 am CDT Oct 2, 2026
Forecast Valid:
8am CDT Oct 2, 2026-6pm CDT Oct 8, 2026
 
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