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

54°F

12°C

Humidity 35%
Wind Speed W 12 mph
Barometer 29.91 in
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill50°F (10°C)
Last update 27 Feb 8:15 pm CST
Extended Forecast for

4 Miles SW Donnellson IA

  • Tonight

    Tonight: Increasing clouds, with a low around 30. Northwest wind 5 to 10 mph becoming northeast after midnight. Winds could gust as high as 20 mph.

    Low: 30 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Partly sunny, with a high near 52. East wind 5 to 10 mph.

    High: 52 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 21. North wind around 10 mph, with gusts as high as 20 mph.

    Low: 21 °F

    Increasing
    Clouds

  • Sunday

    Sunday: A 30 percent chance of snow after noon. Mostly cloudy, with a high near 37. Northeast wind 5 to 10 mph.

    High: 37 °F

    Mostly Cloudy
    then Chance
    Snow

  • Sunday Night

    Sunday Night: Snow likely before 3am, then a chance of snow and freezing rain. Cloudy, with a low around 25. Chance of precipitation is 60%. Little or no ice accumulation expected. New snow accumulation of 1 to 3 inches possible.

    Low: 25 °F

    Snow Likely
    then Chance
    Wintry Mix

  • Monday

    Monday: Mostly cloudy, with a high near 42.

    High: 42 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Rain likely, mainly after midnight. Cloudy, with a low around 33. Chance of precipitation is 60%.

    Low: 33 °F

    Rain Likely

  • Tuesday

    Tuesday: Rain likely. Cloudy, with a high near 48. Chance of precipitation is 70%.

    High: 48 °F

    Rain Likely

  • Tuesday Night

    Tuesday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 35.

    Low: 35 °F

    Chance Rain

Detailed Forecast

Tonight
Increasing clouds, with a low around 30. Northwest wind 5 to 10 mph becoming northeast after midnight. Winds could gust as high as 20 mph.
Saturday
Partly sunny, with a high near 52. East wind 5 to 10 mph.
Saturday Night
Increasing clouds, with a low around 21. North wind around 10 mph, with gusts as high as 20 mph.
Sunday
A 30 percent chance of snow after noon. Mostly cloudy, with a high near 37. Northeast wind 5 to 10 mph.
Sunday Night
Snow likely before 3am, then a chance of snow and freezing rain. Cloudy, with a low around 25. Chance of precipitation is 60%. Little or no ice accumulation expected. New snow accumulation of 1 to 3 inches possible.
Monday
Mostly cloudy, with a high near 42.
Monday Night
Rain likely, mainly after midnight. Cloudy, with a low around 33. Chance of precipitation is 60%.
Tuesday
Rain likely. Cloudy, with a high near 48. Chance of precipitation is 70%.
Tuesday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 35.
Wednesday
A 50 percent chance of rain. Mostly cloudy, with a high near 53.
Wednesday Night
Rain likely. Cloudy, with a low around 41. Chance of precipitation is 60%.
Thursday
A 50 percent chance of rain. Mostly cloudy, with a high near 58.
Thursday Night
A 40 percent chance of rain. Partly cloudy, with a low around 42.
Friday
Rain likely. Cloudy, with a high near 60. Chance of precipitation is 60%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SW Donnellson IA
 40.59°N 91.62°W (Elev. 689 ft)
Last Update:
4:26 pm CST Feb 27, 2026
Forecast Valid:
8pm CST Feb 27, 2026-6pm CST Mar 6, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation