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

Fort Madison Municipal Airport (KFSW)

Lat: 40.66°NLon: 91.33°WElev: 719ft.

Fair

59°F

15°C

Humidity 88%
Wind Speed NE 7 mph
Barometer 30.14 in
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 16 Oct 1:55 am CDT
Extended Forecast for

Donnellson IA

  • Overnight

    Overnight: Mostly cloudy, with a steady temperature around 61. East wind around 5 mph.

    Low: 61 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 81. Southeast wind 5 to 10 mph.

    High: 81 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Increasing clouds, with a low around 62. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 62 °F

    Increasing
    Clouds

  • Friday

    Friday: Partly sunny, with a high near 82. South wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 82 °F

    Partly Sunny

  • Friday Night

    Friday Night: Showers, mainly after 1am. Low around 61. Chance of precipitation is 80%.

    Low: 61 °F

    Chance
    Showers then
    Showers

  • Saturday

    Saturday: Showers likely, with thunderstorms also possible after 1pm. Partly sunny, with a high near 70. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 70 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Mostly cloudy, with a low around 46. Chance of precipitation is 60%.

    Low: 46 °F

    Showers
    Likely

  • Sunday

    Sunday: Sunny, with a high near 61.

    High: 61 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 41.

    Low: 41 °F

    Clear

Detailed Forecast

Overnight
Mostly cloudy, with a steady temperature around 61. East wind around 5 mph.
Thursday
Mostly sunny, with a high near 81. Southeast wind 5 to 10 mph.
Thursday Night
Increasing clouds, with a low around 62. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Friday
Partly sunny, with a high near 82. South wind 10 to 15 mph, with gusts as high as 20 mph.
Friday Night
Showers, mainly after 1am. Low around 61. Chance of precipitation is 80%.
Saturday
Showers likely, with thunderstorms also possible after 1pm. Partly sunny, with a high near 70. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.
Saturday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Mostly cloudy, with a low around 46. Chance of precipitation is 60%.
Sunday
Sunny, with a high near 61.
Sunday Night
Clear, with a low around 41.
Monday
Sunny, with a high near 70.
Monday Night
Mostly clear, with a low around 48.
Tuesday
Sunny, with a high near 68.
Tuesday Night
Mostly clear, with a low around 44.
Wednesday
Sunny, with a high near 65.
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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:
9:37 pm CDT Oct 15, 2025
Forecast Valid:
2am CDT Oct 16, 2025-6pm CDT Oct 22, 2025
 
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