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

40°F

4°C

Humidity 41%
Wind Speed E 7 mph
Barometer 30.20 in
Dewpoint 18°F (-8°C)
Visibility 10.00 mi
Wind Chill35°F (2°C)
Last update 19 Apr 9:35 pm CDT
Extended Forecast for

Fort Thompson SD

  • Tonight

    Tonight: Mostly clear, with a low around 32. Southeast wind 10 to 14 mph.

    Low: 32 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 79. Breezy, with a south wind 13 to 21 mph.

    High: 79 °F

    Mostly Sunny
    and Breezy

  • Monday Night

    Monday Night: Mostly clear, with a low around 42. Northeast wind 5 to 10 mph becoming light north after midnight.

    Low: 42 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 82. North northeast wind 5 to 10 mph becoming southeast in the afternoon.

    High: 82 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 54. Southeast wind 11 to 14 mph, with gusts as high as 23 mph.

    Low: 54 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny and hot, with a high near 90. Breezy, with a south wind 11 to 16 mph increasing to 23 to 28 mph in the afternoon. Winds could gust as high as 37 mph.

    High: 90 °F

    Hot and
    Breezy

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 54. Breezy, with a south southeast wind 17 to 24 mph, with gusts as high as 36 mph. Chance of precipitation is 70%.

    Low: 54 °F

    Showers
    Likely and
    Breezy

  • Thursday

    Thursday: A chance of showers. Mostly sunny, with a high near 68. Windy, with a west wind 17 to 22 mph increasing to 29 to 34 mph in the afternoon. Winds could gust as high as 44 mph. Chance of precipitation is 30%.

    High: 68 °F

    Chance
    Showers and
    Windy

  • Thursday Night

    Thursday Night: A chance of showers before 1am. Mostly cloudy, with a low around 35. Windy, with a west northwest wind 25 to 31 mph, with gusts as high as 41 mph. Chance of precipitation is 30%.

    Low: 35 °F

    Chance
    Showers and
    Windy

Detailed Forecast

Tonight
Mostly clear, with a low around 32. Southeast wind 10 to 14 mph.
Monday
Mostly sunny, with a high near 79. Breezy, with a south wind 13 to 21 mph.
Monday Night
Mostly clear, with a low around 42. Northeast wind 5 to 10 mph becoming light north after midnight.
Tuesday
Sunny, with a high near 82. North northeast wind 5 to 10 mph becoming southeast in the afternoon.
Tuesday Night
Mostly clear, with a low around 54. Southeast wind 11 to 14 mph, with gusts as high as 23 mph.
Wednesday
Mostly sunny and hot, with a high near 90. Breezy, with a south wind 11 to 16 mph increasing to 23 to 28 mph in the afternoon. Winds could gust as high as 37 mph.
Wednesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 54. Breezy, with a south southeast wind 17 to 24 mph, with gusts as high as 36 mph. Chance of precipitation is 70%.
Thursday
A chance of showers. Mostly sunny, with a high near 68. Windy, with a west wind 17 to 22 mph increasing to 29 to 34 mph in the afternoon. Winds could gust as high as 44 mph. Chance of precipitation is 30%.
Thursday Night
A chance of showers before 1am. Mostly cloudy, with a low around 35. Windy, with a west northwest wind 25 to 31 mph, with gusts as high as 41 mph. Chance of precipitation is 30%.
Friday
Mostly sunny, with a high near 56. Breezy.
Friday Night
Partly cloudy, with a low around 30.
Saturday
A slight chance of rain and snow showers. Partly sunny, with a high near 54. Chance of precipitation is 20%.
Saturday Night
Mostly cloudy, with a low around 31.
Sunday
A slight chance of rain and snow showers. Partly sunny, with a high near 56. 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:
9:36 pm CDT Apr 19, 2026
Forecast Valid:
9pm CDT Apr 19, 2026-6pm CDT Apr 26, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation