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

Hazardous Weather Conditions

Current conditions at

Fort Madison Municipal Airport (KFSW)

Lat: 40.66°NLon: 91.33°WElev: 719ft.

Fair

61°F

16°C

Humidity 36%
Wind Speed SE 12 mph
Barometer 30.21 in
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Last update 20 Apr 2:55 pm CDT
Extended Forecast for

Donnellson IA

  • This Afternoon

    This Afternoon: Sunny, with a high near 65. South wind around 10 mph, with gusts as high as 20 mph.

    High: 65 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 52. South wind around 10 mph, with gusts as high as 25 mph.

    Low: 52 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Sunny, with a high near 79. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 79 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 56. Southwest wind around 10 mph, with gusts as high as 20 mph.

    Low: 56 °F

    Slight Chance
    T-storms

  • Wednesday

    Wednesday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

  • Thursday

    Thursday: Partly sunny, with a high near 80.

    High: 80 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm. Low around 56. Chance of precipitation is 90%.

    Low: 56 °F

    Showers

  • Friday

    Friday: A 50 percent chance of showers. Mostly cloudy, with a high near 69.

    High: 69 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
Sunny, with a high near 65. South wind around 10 mph, with gusts as high as 20 mph.
Tonight
Increasing clouds, with a low around 52. South wind around 10 mph, with gusts as high as 25 mph.
Tuesday
Sunny, with a high near 79. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 56. Southwest wind around 10 mph, with gusts as high as 20 mph.
Wednesday
Sunny, with a high near 78.
Wednesday Night
Mostly clear, with a low around 59.
Thursday
Partly sunny, with a high near 80.
Thursday Night
Showers and possibly a thunderstorm. Low around 56. Chance of precipitation is 90%.
Friday
A 50 percent chance of showers. Mostly cloudy, with a high near 69.
Friday Night
Partly cloudy, with a low around 46.
Saturday
Mostly sunny, with a high near 66.
Saturday Night
Mostly cloudy, with a low around 45.
Sunday
A 30 percent chance of showers. Partly sunny, with a high near 63.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Donnellson IA
 40.64°N 91.56°W (Elev. 705 ft)
Last Update:
2:51 pm CDT Apr 20, 2026
Forecast Valid:
3pm CDT Apr 20, 2026-6pm CDT Apr 26, 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