National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Chamberlain, Chamberlain Municipal Airport (K9V9)

Lat: 43.77°NLon: 99.32°WElev: 1693ft.

Fog/Mist

61°F

16°C

Humidity 100%
Wind Speed SE 5 mph
Barometer 29.99 in
Dewpoint 61°F (16°C)
Visibility 5.00 mi
Last update 26 Sep 10:55 pm CDT
Extended Forecast for

Fort Thompson SD

  • Tonight

    Tonight: Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 57. East wind 3 to 5 mph.

    Low: 57 °F

    Patchy Fog

  • Sunday

    Sunday: Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 72. East wind 5 to 10 mph.

    High: 72 °F

    Patchy Fog
    then Mostly
    Cloudy

  • Sunday Night

    Sunday Night: A slight chance of showers between 10pm and 1am. Mostly cloudy, with a low around 58. East wind around 9 mph. Chance of precipitation is 20%.

    Low: 58 °F

    Slight Chance
    Showers

  • Monday

    Monday: Mostly cloudy, with a high near 73. South southeast wind 11 to 18 mph, with gusts as high as 28 mph.

    High: 73 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm. Low around 58. South southeast wind 8 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 58 °F

    Showers

  • Tuesday

    Tuesday: A chance of showers before 1pm. Mostly cloudy, with a high near 71. West wind 6 to 10 mph becoming north northwest in the afternoon. Chance of precipitation is 40%.

    High: 71 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 52. North northeast wind around 5 mph becoming light and variable.

    Low: 52 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 72. South wind 3 to 7 mph.

    High: 72 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 52. Light and variable wind becoming south southeast around 5 mph in the evening.

    Low: 52 °F

    Partly Cloudy

Detailed Forecast

Tonight
Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 57. East wind 3 to 5 mph.
Sunday
Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 72. East wind 5 to 10 mph.
Sunday Night
A slight chance of showers between 10pm and 1am. Mostly cloudy, with a low around 58. East wind around 9 mph. Chance of precipitation is 20%.
Monday
Mostly cloudy, with a high near 73. South southeast wind 11 to 18 mph, with gusts as high as 28 mph.
Monday Night
Showers and possibly a thunderstorm. Low around 58. South southeast wind 8 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday
A chance of showers before 1pm. Mostly cloudy, with a high near 71. West wind 6 to 10 mph becoming north northwest in the afternoon. Chance of precipitation is 40%.
Tuesday Night
Partly cloudy, with a low around 52. North northeast wind around 5 mph becoming light and variable.
Wednesday
Mostly sunny, with a high near 72. South wind 3 to 7 mph.
Wednesday Night
Partly cloudy, with a low around 52. Light and variable wind becoming south southeast around 5 mph in the evening.
Thursday
Mostly sunny, with a high near 68.
Thursday Night
Mostly clear, with a low around 49.
Friday
A slight chance of showers. Mostly sunny, with a high near 66. Chance of precipitation is 20%.
Friday Night
Partly cloudy, with a low around 49.
Saturday
Mostly sunny, with a high near 63.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Fort Thompson SD
 44.05°N 99.4°W (Elev. 1447 ft)
Last Update:
10:16 pm CDT Sep 26, 2026
Forecast Valid:
11pm CDT Sep 26, 2026-6pm CDT Oct 3, 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