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

39°F

4°C

Humidity 54%
Wind Speed NE 8 mph
Barometer 30.18 in
Dewpoint 24°F (-4°C)
Visibility 10.00 mi
Wind Chill33°F (1°C)
Last update 9 Apr 2:35 pm CDT
Extended Forecast for

Fort Thompson SD

  • This Afternoon

    This Afternoon: Cloudy, with a high near 47. North northeast wind 6 to 8 mph.

    High: 47 °F

    Cloudy

  • Tonight

    Tonight: Partly cloudy, with a low around 23. Northeast wind 5 to 7 mph becoming calm after midnight.

    Low: 23 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 58. Light east southeast wind becoming south southeast 5 to 10 mph in the afternoon.

    High: 58 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 41. Southeast wind 14 to 17 mph, with gusts as high as 25 mph.

    Low: 41 °F

    Mostly Cloudy

  • Saturday

    Saturday: A chance of rain, mainly before 1pm. Mostly cloudy, with a high near 73. Breezy, with a southeast wind 17 to 25 mph, with gusts as high as 34 mph. Chance of precipitation is 30%.

    High: 73 °F

    Chance Rain
    and Breezy

  • Saturday Night

    Saturday Night: A chance of rain, mainly before 1am. Mostly cloudy, with a low around 53. South southeast wind 14 to 18 mph, with gusts as high as 26 mph. Chance of precipitation is 30%.

    Low: 53 °F

    Chance Rain

  • Sunday

    Sunday: Sunny, with a high near 81. South southwest wind 10 to 18 mph becoming west in the afternoon. Winds could gust as high as 26 mph.

    High: 81 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 48. West northwest wind 6 to 10 mph becoming east northeast after midnight.

    Low: 48 °F

    Mostly Clear

  • Monday

    Monday: A chance of rain after 1pm. Mostly sunny, with a high near 74. Northeast wind 7 to 13 mph. Chance of precipitation is 30%.

    High: 74 °F

    Mostly Sunny
    then Chance
    Rain

Detailed Forecast

This Afternoon
Cloudy, with a high near 47. North northeast wind 6 to 8 mph.
Tonight
Partly cloudy, with a low around 23. Northeast wind 5 to 7 mph becoming calm after midnight.
Friday
Mostly sunny, with a high near 58. Light east southeast wind becoming south southeast 5 to 10 mph in the afternoon.
Friday Night
Mostly cloudy, with a low around 41. Southeast wind 14 to 17 mph, with gusts as high as 25 mph.
Saturday
A chance of rain, mainly before 1pm. Mostly cloudy, with a high near 73. Breezy, with a southeast wind 17 to 25 mph, with gusts as high as 34 mph. Chance of precipitation is 30%.
Saturday Night
A chance of rain, mainly before 1am. Mostly cloudy, with a low around 53. South southeast wind 14 to 18 mph, with gusts as high as 26 mph. Chance of precipitation is 30%.
Sunday
Sunny, with a high near 81. South southwest wind 10 to 18 mph becoming west in the afternoon. Winds could gust as high as 26 mph.
Sunday Night
Mostly clear, with a low around 48. West northwest wind 6 to 10 mph becoming east northeast after midnight.
Monday
A chance of rain after 1pm. Mostly sunny, with a high near 74. Northeast wind 7 to 13 mph. Chance of precipitation is 30%.
Monday Night
A chance of rain and thunderstorms. Mostly cloudy, with a low around 43. Chance of precipitation is 40%.
Tuesday
A chance of rain. Mostly cloudy, with a high near 59. Chance of precipitation is 50%.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 37. Chance of precipitation is 40%.
Wednesday
A chance of rain. Mostly sunny, with a high near 68. Chance of precipitation is 30%.
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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:
2:36 pm CDT Apr 9, 2026
Forecast Valid:
2pm CDT Apr 9, 2026-6pm CDT Apr 15, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation