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

45°F

7°C

Humidity 53%
Wind Speed NE 6 mph
Barometer 29.93 in
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill42°F (6°C)
Last update 14 Feb 6:55 pm CST
Extended Forecast for

4 Miles WNW Donnellson IA

  • Tonight

    Tonight: Patchy fog after 2am. Otherwise, cloudy during the early evening, then gradual clearing, with a low around 38. East wind around 5 mph becoming calm.

    Low: 38 °F

    Cloudy then
    Patchy Fog

  • Sunday

    Sunday: Patchy fog before 9am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 61. Northwest wind 5 to 10 mph.

    High: 61 °F

    Patchy Fog
    then Sunny

  • Sunday Night

    Sunday Night: Increasing clouds, with a low around 40. Calm wind becoming south around 5 mph after midnight.

    Low: 40 °F

    Increasing
    Clouds

  • Washington's Birthday

    Washington's Birthday: Partly sunny, with a high near 65. South wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 65 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 44.

    Low: 44 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 67.

    High: 67 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 51.

    Low: 51 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 66.

    High: 66 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 37.

    Low: 37 °F

    Mostly Clear

Detailed Forecast

Tonight
Patchy fog after 2am. Otherwise, cloudy during the early evening, then gradual clearing, with a low around 38. East wind around 5 mph becoming calm.
Sunday
Patchy fog before 9am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 61. Northwest wind 5 to 10 mph.
Sunday Night
Increasing clouds, with a low around 40. Calm wind becoming south around 5 mph after midnight.
Washington's Birthday
Partly sunny, with a high near 65. South wind 5 to 10 mph, with gusts as high as 20 mph.
Monday Night
Mostly cloudy, with a low around 44.
Tuesday
Partly sunny, with a high near 67.
Tuesday Night
Partly cloudy, with a low around 51.
Wednesday
Sunny, with a high near 66.
Wednesday Night
Mostly clear, with a low around 37.
Thursday
A 30 percent chance of rain after noon. Mostly sunny, with a high near 57.
Thursday Night
Partly cloudy, with a low around 30.
Friday
Partly sunny, with a high near 44.
Friday Night
Mostly cloudy, with a low around 24.
Saturday
Mostly sunny, with a high near 44.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WNW Donnellson IA
 40.66°N 91.64°W (Elev. 699 ft)
Last Update:
6:22 pm CST Feb 14, 2026
Forecast Valid:
7pm CST Feb 14, 2026-6pm CST Feb 21, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation