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

37°F

3°C

Humidity 38%
Wind Speed NE 13 G 18 mph
Barometer 30.45 in
Dewpoint 13°F (-11°C)
Visibility 10.00 mi
Wind Chill29°F (-2°C)
Last update 6 Apr 5:15 pm CDT
Extended Forecast for

Fort Thompson SD

  • This Afternoon

    This Afternoon: A slight chance of snow. Cloudy, with a high near 38. East northeast wind around 14 mph. Chance of precipitation is 20%.

    High: 38 °F

    Slight Chance
    Snow

  • Tonight

    Tonight: Cloudy, then gradually becoming partly cloudy, with a low around 22. East northeast wind 10 to 14 mph.

    Low: 22 °F

    Decreasing
    Clouds

  • Tuesday

    Tuesday: Partly sunny, with a high near 46. Breezy, with a south southeast wind 13 to 18 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 34 mph.

    High: 46 °F

    Partly Sunny
    and Breezy

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 34. Breezy, with a south southeast wind 14 to 20 mph, with gusts as high as 29 mph.

    Low: 34 °F

    Partly Cloudy
    and Breezy
    then Partly
    Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 58. Breezy, with a northwest wind 15 to 24 mph, with gusts as high as 33 mph.

    High: 58 °F

    Mostly Sunny
    and Breezy

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 27. Northwest wind 13 to 18 mph decreasing to 6 to 11 mph after midnight. Winds could gust as high as 28 mph.

    Low: 27 °F

    Mostly Clear

  • Thursday

    Thursday: A slight chance of rain and snow before 1pm, then a chance of rain. Partly sunny, with a high near 50. North wind 6 to 8 mph. Chance of precipitation is 30%.

    High: 50 °F

    Chance
    Rain/Snow

  • Thursday Night

    Thursday Night: A slight chance of rain. Partly cloudy, with a low around 26. North northeast wind 5 to 9 mph. Chance of precipitation is 20%.

    Low: 26 °F

    Slight Chance
    Rain

  • Friday

    Friday: A slight chance of rain. Mostly sunny, with a high near 56. Northeast wind 5 to 10 mph becoming southeast in the afternoon. Chance of precipitation is 20%.

    High: 56 °F

    Slight Chance
    Rain

Detailed Forecast

This Afternoon
A slight chance of snow. Cloudy, with a high near 38. East northeast wind around 14 mph. Chance of precipitation is 20%.
Tonight
Cloudy, then gradually becoming partly cloudy, with a low around 22. East northeast wind 10 to 14 mph.
Tuesday
Partly sunny, with a high near 46. Breezy, with a south southeast wind 13 to 18 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 34 mph.
Tuesday Night
Partly cloudy, with a low around 34. Breezy, with a south southeast wind 14 to 20 mph, with gusts as high as 29 mph.
Wednesday
Mostly sunny, with a high near 58. Breezy, with a northwest wind 15 to 24 mph, with gusts as high as 33 mph.
Wednesday Night
Mostly clear, with a low around 27. Northwest wind 13 to 18 mph decreasing to 6 to 11 mph after midnight. Winds could gust as high as 28 mph.
Thursday
A slight chance of rain and snow before 1pm, then a chance of rain. Partly sunny, with a high near 50. North wind 6 to 8 mph. Chance of precipitation is 30%.
Thursday Night
A slight chance of rain. Partly cloudy, with a low around 26. North northeast wind 5 to 9 mph. Chance of precipitation is 20%.
Friday
A slight chance of rain. Mostly sunny, with a high near 56. Northeast wind 5 to 10 mph becoming southeast in the afternoon. Chance of precipitation is 20%.
Friday Night
A slight chance of rain. Mostly cloudy, with a low around 39. Chance of precipitation is 20%.
Saturday
A chance of rain. Mostly cloudy, with a high near 66. Breezy. Chance of precipitation is 30%.
Saturday Night
A chance of rain. Mostly cloudy, with a low around 50. Chance of precipitation is 40%.
Sunday
A chance of rain. Partly sunny, with a high near 77. Chance of precipitation is 40%.
Sunday Night
A chance of rain. Mostly cloudy, with a low around 46. Chance of precipitation is 40%.
Monday
A chance of rain. Partly sunny, with a high near 68. Chance of precipitation is 50%.
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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:
4:51 pm CDT Apr 6, 2026
Forecast Valid:
5pm CDT Apr 6, 2026-6pm CDT Apr 13, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation