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

68°F

20°C

Humidity 69%
Wind Speed E 3 mph
Barometer 30.15 in
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 26 Aug 10:15 pm CDT
Extended Forecast for

Gann Valley SD

  • Tonight

    Tonight: Mostly clear, with a low around 57. Light northeast wind.

    Low: 57 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 86. Calm wind becoming east around 6 mph in the morning.

    High: 86 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 61. East wind 6 to 9 mph.

    Low: 61 °F

    Mostly Clear

  • Friday

    Friday: A slight chance of showers, with thunderstorms also possible after 4pm. Mostly sunny and hot, with a high near 90. Breezy, with a south southeast wind 11 to 16 mph increasing to 17 to 22 mph in the afternoon. Chance of precipitation is 20%.

    High: 90 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms and
    Breezy

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Mostly cloudy, with a low around 68. Breezy, with a south southeast wind 11 to 21 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 68 °F

    Showers
    Likely and
    Breezy

  • Saturday

    Saturday: Mostly sunny and hot, with a high near 92. South wind around 10 mph becoming west southwest in the afternoon.

    High: 92 °F

    Hot

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 68. South southeast wind 7 to 9 mph becoming north northwest after midnight.

    Low: 68 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny and hot, with a high near 90. North wind 7 to 9 mph becoming west in the afternoon.

    High: 90 °F

    Hot

  • Sunday Night

    Sunday Night: A slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 64. Northwest wind around 8 mph becoming northeast in the evening. Chance of precipitation is 20%.

    Low: 64 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

Detailed Forecast

Tonight
Mostly clear, with a low around 57. Light northeast wind.
Thursday
Sunny, with a high near 86. Calm wind becoming east around 6 mph in the morning.
Thursday Night
Mostly clear, with a low around 61. East wind 6 to 9 mph.
Friday
A slight chance of showers, with thunderstorms also possible after 4pm. Mostly sunny and hot, with a high near 90. Breezy, with a south southeast wind 11 to 16 mph increasing to 17 to 22 mph in the afternoon. Chance of precipitation is 20%.
Friday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Mostly cloudy, with a low around 68. Breezy, with a south southeast wind 11 to 21 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday
Mostly sunny and hot, with a high near 92. South wind around 10 mph becoming west southwest in the afternoon.
Saturday Night
Partly cloudy, with a low around 68. South southeast wind 7 to 9 mph becoming north northwest after midnight.
Sunday
Partly sunny and hot, with a high near 90. North wind 7 to 9 mph becoming west in the afternoon.
Sunday Night
A slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 64. Northwest wind around 8 mph becoming northeast in the evening. Chance of precipitation is 20%.
Monday
Mostly sunny, with a high near 85.
Monday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 62. Chance of precipitation is 20%.
Tuesday
A slight chance of showers and thunderstorms. Partly sunny, with a high near 85. Chance of precipitation is 20%.
Tuesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 63. Chance of precipitation is 30%.
Wednesday
Mostly sunny, with a high near 88.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Gann Valley SD
 44.04°N 98.98°W (Elev. 1709 ft)
Last Update:
9:06 pm CDT Aug 26, 2026
Forecast Valid:
10pm CDT Aug 26, 2026-6pm CDT Sep 2, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation