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

51°F

11°C

Humidity 56%
Wind Speed NW 7 mph
Barometer 29.69 in
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Wind Chill48°F (9°C)
Last update 17 Mar 5:55 pm CDT
Extended Forecast for

Fort Thompson SD

  • Tonight

    Tonight: Mostly cloudy, with a low around 32. Light west northwest wind increasing to 5 to 10 mph in the evening.

    Low: 32 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 62. West wind 8 to 10 mph.

    High: 62 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 36. West wind 6 to 8 mph.

    Low: 36 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 68. West northwest wind 7 to 10 mph.

    High: 68 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 40. Southwest wind around 7 mph.

    Low: 40 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 75. West northwest wind 7 to 14 mph.

    High: 75 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 42. West northwest wind 6 to 8 mph becoming south in the evening.

    Low: 42 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 79. Southwest wind 8 to 13 mph becoming northwest in the afternoon.

    High: 79 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 35. North northwest wind 11 to 14 mph.

    Low: 35 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 32. Light west northwest wind increasing to 5 to 10 mph in the evening.
Wednesday
Mostly sunny, with a high near 62. West wind 8 to 10 mph.
Wednesday Night
Partly cloudy, with a low around 36. West wind 6 to 8 mph.
Thursday
Sunny, with a high near 68. West northwest wind 7 to 10 mph.
Thursday Night
Partly cloudy, with a low around 40. Southwest wind around 7 mph.
Friday
Sunny, with a high near 75. West northwest wind 7 to 14 mph.
Friday Night
Mostly clear, with a low around 42. West northwest wind 6 to 8 mph becoming south in the evening.
Saturday
Mostly sunny, with a high near 79. Southwest wind 8 to 13 mph becoming northwest in the afternoon.
Saturday Night
Mostly cloudy, with a low around 35. North northwest wind 11 to 14 mph.
Sunday
Mostly sunny, with a high near 50.
Sunday Night
Partly cloudy, with a low around 25.
Monday
Partly sunny, with a high near 52.
Monday Night
Mostly cloudy, with a low around 29.
Tuesday
Partly sunny, with a high near 56.
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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:
5:36 pm CDT Mar 17, 2026
Forecast Valid:
6pm CDT Mar 17, 2026-6pm CDT Mar 24, 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