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

Tropical Moisture Will Bring Heavy to Excessive Rainfall with Possible Flooding This Week

Tropical moisture from the remnants of Odalys and Hurricane Polo will surge over the southwest into the central U.S. this week with several days of heavy to excessive rainfall which may bring limited to considerable flooding. Flood Watches have been issued through Wednesday in the southwest U.S. and moderate risk outlooks have been issued today through Thursday. Read More >

Current conditions at

Fort Madison Municipal Airport (KFSW)

Lat: 40.66°NLon: 91.33°WElev: 719ft.

Fair

73°F

23°C

Humidity 53%
Wind Speed N 2 mph
Barometer 30.02 in
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 28 Sep 6:15 pm CDT
Extended Forecast for

Donnellson IA

  • Tonight

    Tonight: Clear, with a low around 54. Calm wind.

    Low: 54 °F

    Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 79. South wind around 5 mph.

    High: 79 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 10 percent chance of showers after 5am. Mostly cloudy, with a low around 65. South wind around 5 mph.

    Low: 65 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Wednesday

    Wednesday: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 77. South wind around 5 mph.

    High: 77 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Showers likely, mainly after 1am. Cloudy, with a low around 67. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 67 °F

    Chance
    Showers then
    Showers
    Likely

  • Thursday

    Thursday: Showers and possibly a thunderstorm before 10am, then showers between 10am and 1pm, then showers and possibly a thunderstorm after 1pm. High near 72. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.

    High: 72 °F

    Showers

  • Thursday Night

    Thursday Night: Showers likely, mainly before 1am. Mostly cloudy, with a low around 56. Chance of precipitation is 70%.

    Low: 56 °F

    Showers
    Likely

  • Friday

    Friday: A 40 percent chance of showers. Partly sunny, with a high near 67.

    High: 67 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 52.

    Low: 52 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Clear, with a low around 54. Calm wind.
Tuesday
Mostly sunny, with a high near 79. South wind around 5 mph.
Tuesday Night
A 10 percent chance of showers after 5am. Mostly cloudy, with a low around 65. South wind around 5 mph.
Wednesday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 77. South wind around 5 mph.
Wednesday Night
Showers likely, mainly after 1am. Cloudy, with a low around 67. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.
Thursday
Showers and possibly a thunderstorm before 10am, then showers between 10am and 1pm, then showers and possibly a thunderstorm after 1pm. High near 72. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.
Thursday Night
Showers likely, mainly before 1am. Mostly cloudy, with a low around 56. Chance of precipitation is 70%.
Friday
A 40 percent chance of showers. Partly sunny, with a high near 67.
Friday Night
Mostly cloudy, with a low around 52.
Saturday
Partly sunny, with a high near 68.
Saturday Night
Mostly cloudy, with a low around 53.
Sunday
Mostly sunny, with a high near 68.
Sunday Night
Mostly clear, with a low around 49.
Monday
Sunny, with a high near 64.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Donnellson IA
 40.64°N 91.56°W (Elev. 705 ft)
Last Update:
4:26 pm CDT Sep 28, 2026
Forecast Valid:
6pm CDT Sep 28, 2026-6pm CDT Oct 5, 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