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

N/A

Humidity NA
Wind Speed Calm
Barometer 30.09 in
Dewpoint N/A
Visibility 10.00 mi
Last update 25 Jun 7:15 am CDT
Extended Forecast for

Fort Thompson SD

  • Today

    Today: Mostly cloudy, with a high near 77. Light and variable wind becoming east around 5 mph in the afternoon.

    High: 77 °F

    Mostly Cloudy

  • Tonight

    Tonight: Showers likely, mainly after 5am. Mostly cloudy, with a low around 55. Southeast wind around 6 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 55 °F

    Mostly Cloudy
    then Showers
    Likely

  • Friday

    Friday: Showers likely, mainly before 7am. Cloudy through mid morning, then gradual clearing, with a high near 82. Breezy, with a south southeast wind 7 to 12 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 60%.

    High: 82 °F

    Showers
    Likely then
    Mostly Sunny
    and Breezy

  • Friday Night

    Friday Night: Increasing clouds, with a low around 63. South southeast wind 16 to 18 mph, with gusts as high as 28 mph.

    Low: 63 °F

    Increasing
    Clouds

  • Saturday

    Saturday: A chance of showers, with thunderstorms also possible after 4pm. Mostly cloudy, with a high near 86. Breezy, with a south southeast wind 20 to 28 mph, with gusts as high as 36 mph. Chance of precipitation is 30%.

    High: 86 °F

    Chance
    Showers and
    Breezy

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 66. Breezy, with a southeast wind 15 to 23 mph, with gusts as high as 31 mph. Chance of precipitation is 50%.

    Low: 66 °F

    Slight Chance
    T-storms and
    Breezy then
    Chance
    T-storms

  • Sunday

    Sunday: Sunny and hot, with a high near 93. Southeast wind 11 to 13 mph becoming west southwest in the afternoon. Winds could gust as high as 22 mph.

    High: 93 °F

    Hot

  • Sunday Night

    Sunday Night: A slight chance of showers and thunderstorms after 1am. Mostly clear, with a low around 65. Southeast wind 6 to 9 mph. Chance of precipitation is 20%.

    Low: 65 °F

    Clear then
    Slight Chance
    T-storms

  • Monday

    Monday: Sunny and hot, with a high near 90. South southeast wind 11 to 15 mph becoming west northwest in the afternoon. Winds could gust as high as 24 mph.

    High: 90 °F

    Hot

Detailed Forecast

Today
Mostly cloudy, with a high near 77. Light and variable wind becoming east around 5 mph in the afternoon.
Tonight
Showers likely, mainly after 5am. Mostly cloudy, with a low around 55. Southeast wind around 6 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Friday
Showers likely, mainly before 7am. Cloudy through mid morning, then gradual clearing, with a high near 82. Breezy, with a south southeast wind 7 to 12 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 60%.
Friday Night
Increasing clouds, with a low around 63. South southeast wind 16 to 18 mph, with gusts as high as 28 mph.
Saturday
A chance of showers, with thunderstorms also possible after 4pm. Mostly cloudy, with a high near 86. Breezy, with a south southeast wind 20 to 28 mph, with gusts as high as 36 mph. Chance of precipitation is 30%.
Saturday Night
A chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 66. Breezy, with a southeast wind 15 to 23 mph, with gusts as high as 31 mph. Chance of precipitation is 50%.
Sunday
Sunny and hot, with a high near 93. Southeast wind 11 to 13 mph becoming west southwest in the afternoon. Winds could gust as high as 22 mph.
Sunday Night
A slight chance of showers and thunderstorms after 1am. Mostly clear, with a low around 65. Southeast wind 6 to 9 mph. Chance of precipitation is 20%.
Monday
Sunny and hot, with a high near 90. South southeast wind 11 to 15 mph becoming west northwest in the afternoon. Winds could gust as high as 24 mph.
Monday Night
Mostly clear, with a low around 62.
Tuesday
Mostly sunny and hot, with a high near 90.
Tuesday Night
Partly cloudy, with a low around 63.
Wednesday
A slight chance of showers and thunderstorms. Mostly sunny and hot, with a high near 94. Chance of precipitation is 20%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Fort Thompson SD
 44.05°N 99.4°W (Elev. 1447 ft)
Last Update:
6:36 am CDT Jun 25, 2026
Forecast Valid:
7am CDT Jun 25, 2026-6pm CDT Jul 1, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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