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

23°F

-5°C

Humidity 63%
Wind Speed S 10 mph
Barometer 30.15 in
Dewpoint 12°F (-11°C)
Visibility 10.00 mi
Wind Chill13°F (-11°C)
Last update 24 Feb 1:35 am CST
Extended Forecast for

4 Miles SSE Donnellson IA

  • Overnight

    Overnight: Mostly cloudy, with a low around 16. South wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 16 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 49. Breezy, with a south wind 10 to 20 mph becoming west in the afternoon. Winds could gust as high as 30 mph.

    High: 49 °F

    Mostly Cloudy
    and Breezy
    then Mostly
    Cloudy

  • Tuesday Night

    Tuesday Night: Cloudy during the early evening, then gradual clearing, with a low around 25. Northwest wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 25 °F

    Gradual
    Clearing

  • Wednesday

    Wednesday: Mostly sunny, with a high near 43. Northwest wind around 5 mph becoming northeast in the afternoon.

    High: 43 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Rain and snow likely before 3am, then a chance of snow. Mostly cloudy, with a low around 28. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    Low: 28 °F

    Rain/Snow
    Likely

  • Thursday

    Thursday: Mostly sunny, with a high near 46.

    High: 46 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 30.

    Low: 30 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 64.

    High: 64 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 33.

    Low: 33 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 16. South wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday
Mostly cloudy, with a high near 49. Breezy, with a south wind 10 to 20 mph becoming west in the afternoon. Winds could gust as high as 30 mph.
Tuesday Night
Cloudy during the early evening, then gradual clearing, with a low around 25. Northwest wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday
Mostly sunny, with a high near 43. Northwest wind around 5 mph becoming northeast in the afternoon.
Wednesday Night
Rain and snow likely before 3am, then a chance of snow. Mostly cloudy, with a low around 28. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Thursday
Mostly sunny, with a high near 46.
Thursday Night
Mostly clear, with a low around 30.
Friday
Sunny, with a high near 64.
Friday Night
Mostly clear, with a low around 33.
Saturday
Sunny, with a high near 50.
Saturday Night
Mostly cloudy, with a low around 23.
Sunday
A 40 percent chance of snow. Partly sunny, with a high near 38.
Sunday Night
A chance of rain and snow. Mostly cloudy, with a low around 23. Chance of precipitation is 40%.
Monday
A chance of rain and snow. Mostly cloudy, with a high near 39. Chance of precipitation is 30%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSE Donnellson IA
 40.59°N 91.53°W (Elev. 702 ft)
Last Update:
10:42 pm CST Feb 23, 2026
Forecast Valid:
1am CST Feb 24, 2026-6pm CST Mar 2, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation