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

62°F

17°C

Humidity 67%
Wind Speed NW 12 mph
Barometer 30.09 in
Dewpoint 51°F (11°C)
Visibility 10.00 mi
Last update 19 Jun 10:15 am CDT
Extended Forecast for

Iona SD

  • Juneteenth

    Juneteenth: A chance of showers, mainly before noon. Partly sunny, with a high near 78. Northwest wind 7 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.

    High: 78 °F

    Chance
    Showers

  • Tonight

    Tonight: Partly cloudy, with a low around 52. North northwest wind 7 to 15 mph becoming east after midnight.

    Low: 52 °F

    Partly Cloudy

  • Saturday

    Saturday: Showers likely, with thunderstorms also possible after 4pm. Partly sunny, with a high near 77. Breezy, with an east southeast wind 9 to 14 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 31 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 77 °F

    Mostly Sunny
    then Showers
    Likely and
    Breezy

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 7pm. Low around 55. Breezy, with an east wind 18 to 21 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.

    Low: 55 °F

    Showers and
    Breezy

  • Sunday

    Sunday: Showers and possibly a thunderstorm. High near 65. Breezy, with an east northeast wind 18 to 21 mph, with gusts as high as 31 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 65 °F

    Showers and
    Breezy

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 50. Northeast wind 6 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 40%.

    Low: 50 °F

    Chance
    Showers

  • Monday

    Monday: A slight chance of showers after 1pm. Partly sunny, with a high near 72. North northwest wind 7 to 9 mph becoming southeast in the afternoon. Chance of precipitation is 20%.

    High: 72 °F

    Partly Sunny
    then Slight
    Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 53. South southeast wind around 11 mph becoming southwest after midnight. Chance of precipitation is 60%.

    Low: 53 °F

    Showers
    Likely

  • Tuesday

    Tuesday: A slight chance of showers before 1pm. Mostly sunny, with a high near 74. Breezy, with a northwest wind 14 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.

    High: 74 °F

    Slight Chance
    Showers and
    Breezy

Detailed Forecast

Juneteenth
A chance of showers, mainly before noon. Partly sunny, with a high near 78. Northwest wind 7 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.
Tonight
Partly cloudy, with a low around 52. North northwest wind 7 to 15 mph becoming east after midnight.
Saturday
Showers likely, with thunderstorms also possible after 4pm. Partly sunny, with a high near 77. Breezy, with an east southeast wind 9 to 14 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 31 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 7pm. Low around 55. Breezy, with an east wind 18 to 21 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.
Sunday
Showers and possibly a thunderstorm. High near 65. Breezy, with an east northeast wind 18 to 21 mph, with gusts as high as 31 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Sunday Night
A chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 50. Northeast wind 6 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 40%.
Monday
A slight chance of showers after 1pm. Partly sunny, with a high near 72. North northwest wind 7 to 9 mph becoming southeast in the afternoon. Chance of precipitation is 20%.
Monday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 53. South southeast wind around 11 mph becoming southwest after midnight. Chance of precipitation is 60%.
Tuesday
A slight chance of showers before 1pm. Mostly sunny, with a high near 74. Breezy, with a northwest wind 14 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.
Tuesday Night
Mostly clear, with a low around 51.
Wednesday
A slight chance of showers. Mostly sunny, with a high near 75. Chance of precipitation is 20%.
Wednesday Night
A chance of showers. Partly cloudy, with a low around 54. Chance of precipitation is 30%.
Thursday
A chance of showers and thunderstorms. Partly sunny, with a high near 77. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Iona SD
 43.54°N 99.44°W (Elev. 1923 ft)
Last Update:
10:36 am CDT Jun 19, 2026
Forecast Valid:
10am CDT Jun 19, 2026-6pm CDT Jun 25, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation