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

Excessive Rainfall and Significant Flooding in the Upper Midwest This Weekend

Heavy to excessive rainfall is expected over the weekend across eastern Iowa, northern Missouri, northwest Illinois and southern Wisconsin. Numerous flash floods, some with significant impacts, are expected in these areas. Heaviest rainfall will occur overnight Saturday and Sunday, so be sure to have multiple ways to receive warnings. Read More >

Current conditions at

Chamberlain, Chamberlain Municipal Airport (K9V9)

Lat: 43.77°NLon: 99.32°WElev: 1693ft.

Fair

67°F

19°C

Humidity 71%
Wind Speed W 5 mph
Barometer 30.00 in
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 9 Aug 10:55 pm CDT
Extended Forecast for

2 Miles NE Iona SD

  • Tonight

    Tonight: Mostly cloudy, with a low around 62. South southwest wind 8 to 10 mph becoming west northwest after midnight.

    Low: 62 °F

    Mostly Cloudy

  • Sunday

    Sunday: Areas of smoke after 11am. Mostly sunny, with a high near 82. Northwest wind 10 to 13 mph.

    High: 82 °F

    Areas Smoke

  • Sunday Night

    Sunday Night: Areas of smoke before 4am. Mostly clear, with a low around 61. North northwest wind 6 to 9 mph becoming south southeast in the evening.

    Low: 61 °F

    Areas Smoke

  • Monday

    Monday: Sunny, with a high near 88. Southwest wind around 11 mph.

    High: 88 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 63. South southwest wind 10 to 14 mph.

    Low: 63 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 87. North wind around 11 mph.

    High: 87 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 65. East wind 10 to 14 mph becoming south southeast after midnight.

    Low: 65 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 92. Breezy, with a south wind 13 to 22 mph, with gusts as high as 31 mph.

    High: 92 °F

    Sunny then
    Sunny and
    Breezy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 68. Breezy, with a south southeast wind 17 to 21 mph.

    Low: 68 °F

    Partly Cloudy
    and Breezy
    then Mostly
    Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 62. South southwest wind 8 to 10 mph becoming west northwest after midnight.
Sunday
Areas of smoke after 11am. Mostly sunny, with a high near 82. Northwest wind 10 to 13 mph.
Sunday Night
Areas of smoke before 4am. Mostly clear, with a low around 61. North northwest wind 6 to 9 mph becoming south southeast in the evening.
Monday
Sunny, with a high near 88. Southwest wind around 11 mph.
Monday Night
Partly cloudy, with a low around 63. South southwest wind 10 to 14 mph.
Tuesday
Sunny, with a high near 87. North wind around 11 mph.
Tuesday Night
Mostly clear, with a low around 65. East wind 10 to 14 mph becoming south southeast after midnight.
Wednesday
Sunny and hot, with a high near 92. Breezy, with a south wind 13 to 22 mph, with gusts as high as 31 mph.
Wednesday Night
Partly cloudy, with a low around 68. Breezy, with a south southeast wind 17 to 21 mph.
Thursday
Sunny and hot, with a high near 95.
Thursday Night
Partly cloudy, with a low around 69.
Friday
Mostly sunny and hot, with a high near 92.
Friday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 67. Chance of precipitation is 20%.
Saturday
Mostly sunny and hot, with a high near 90.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NE Iona SD
 43.56°N 99.41°W (Elev. 1801 ft)
Last Update:
10:45 pm CDT Aug 9, 2025
Forecast Valid:
11pm CDT Aug 9, 2025-6pm CDT Aug 16, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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