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

46°F

8°C

Humidity 62%
Wind Speed N 17 G 26 mph
Barometer 29.85 in
Dewpoint 33°F (1°C)
Visibility 10.00 mi
Wind Chill39°F (4°C)
Last update 31 Mar 12:35 am CDT
Extended Forecast for

Fort Thompson SD

  • Overnight

    Overnight: Mostly cloudy, with a low around 36. North wind around 17 mph, with gusts as high as 34 mph.

    Low: 36 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Increasing clouds, with a high near 50. North wind 14 to 18 mph.

    High: 50 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: A chance of snow after midnight. Cloudy, with a low around 29. Northeast wind 10 to 14 mph. Chance of precipitation is 30%.

    Low: 29 °F

    Chance Snow

  • Wednesday

    Wednesday: A chance of snow before 1pm, then rain and snow. High near 41. East wind 14 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.

    High: 41 °F

    Chance Snow
    then
    Rain/Snow

  • Wednesday Night

    Wednesday Night: Rain and snow. Low around 29. East northeast wind 10 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    Low: 29 °F

    Rain/Snow

  • Thursday

    Thursday: Snow likely before 10am, then rain and snow likely between 10am and 4pm, then a slight chance of rain after 4pm. Cloudy, with a high near 42. Northeast wind 8 to 10 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 42 °F

    Rain/Snow
    Likely

  • Thursday Night

    Thursday Night: A slight chance of rain and snow before 1am, then rain, snow, and freezing rain likely between 1am and 4am, then snow and freezing rain likely after 4am. Mostly cloudy, with a low around 28. East wind around 11 mph. Chance of precipitation is 60%.

    Low: 28 °F

    Slight Chance
    Rain/Snow
    then Wintry
    Mix Likely

  • Friday

    Friday: Snow and freezing rain likely before 7am, then rain, snow, and freezing rain likely between 7am and 1pm, then snow likely, possibly mixed with rain after 1pm. Mostly cloudy, with a high near 43. East northeast wind 13 to 15 mph. Chance of precipitation is 70%.

    High: 43 °F

    Wintry Mix
    Likely

  • Friday Night

    Friday Night: A chance of snow. Mostly cloudy, with a low around 26. Northwest wind around 14 mph. Chance of precipitation is 50%.

    Low: 26 °F

    Chance Snow

Detailed Forecast

Overnight
Mostly cloudy, with a low around 36. North wind around 17 mph, with gusts as high as 34 mph.
Tuesday
Increasing clouds, with a high near 50. North wind 14 to 18 mph.
Tuesday Night
A chance of snow after midnight. Cloudy, with a low around 29. Northeast wind 10 to 14 mph. Chance of precipitation is 30%.
Wednesday
A chance of snow before 1pm, then rain and snow. High near 41. East wind 14 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.
Wednesday Night
Rain and snow. Low around 29. East northeast wind 10 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Thursday
Snow likely before 10am, then rain and snow likely between 10am and 4pm, then a slight chance of rain after 4pm. Cloudy, with a high near 42. Northeast wind 8 to 10 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Thursday Night
A slight chance of rain and snow before 1am, then rain, snow, and freezing rain likely between 1am and 4am, then snow and freezing rain likely after 4am. Mostly cloudy, with a low around 28. East wind around 11 mph. Chance of precipitation is 60%.
Friday
Snow and freezing rain likely before 7am, then rain, snow, and freezing rain likely between 7am and 1pm, then snow likely, possibly mixed with rain after 1pm. Mostly cloudy, with a high near 43. East northeast wind 13 to 15 mph. Chance of precipitation is 70%.
Friday Night
A chance of snow. Mostly cloudy, with a low around 26. Northwest wind around 14 mph. Chance of precipitation is 50%.
Saturday
A chance of snow. Mostly cloudy, with a high near 42. Breezy. Chance of precipitation is 30%.
Saturday Night
A slight chance of snow. Partly cloudy, with a low around 20. Chance of precipitation is 20%.
Sunday
Sunny, with a high near 50.
Sunday Night
Partly cloudy, with a low around 28.
Monday
Partly sunny, with a high near 52.
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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:
12:36 am CDT Mar 31, 2026
Forecast Valid:
12am CDT Mar 31, 2026-6pm CDT Apr 6, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation