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.

Overcast

34°F

1°C

Humidity 81%
Wind Speed E 7 mph
Barometer 29.90 in
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill28°F (-2°C)
Last update 26 Feb 9:35 am CST
Extended Forecast for

4 Miles SSW Bonaparte IA

  • Today

    Today: Mostly sunny, with a high near 55. South wind around 5 mph becoming southwest in the afternoon.

    High: 55 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 31. Southwest wind around 5 mph.

    Low: 31 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 69. Southwest wind 5 to 15 mph, with gusts as high as 30 mph.

    High: 69 °F

    Sunny

  • Friday Night

    Friday Night: Increasing clouds, with a low around 29. West wind 5 to 10 mph becoming northeast after midnight. Winds could gust as high as 20 mph.

    Low: 29 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Partly sunny, with a high near 46.

    High: 46 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 20.

    Low: 20 °F

    Mostly Clear

  • Sunday

    Sunday: Snow likely after noon. Cloudy, with a high near 34. Chance of precipitation is 60%.

    High: 34 °F

    Cloudy then
    Snow Likely

  • Sunday Night

    Sunday Night: A 50 percent chance of snow before midnight. Cloudy, with a low around 19.

    Low: 19 °F

    Chance Snow
    then Mostly
    Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 36.

    High: 36 °F

    Mostly Cloudy

Detailed Forecast

Today
Mostly sunny, with a high near 55. South wind around 5 mph becoming southwest in the afternoon.
Tonight
Mostly clear, with a low around 31. Southwest wind around 5 mph.
Friday
Sunny, with a high near 69. Southwest wind 5 to 15 mph, with gusts as high as 30 mph.
Friday Night
Increasing clouds, with a low around 29. West wind 5 to 10 mph becoming northeast after midnight. Winds could gust as high as 20 mph.
Saturday
Partly sunny, with a high near 46.
Saturday Night
Mostly clear, with a low around 20.
Sunday
Snow likely after noon. Cloudy, with a high near 34. Chance of precipitation is 60%.
Sunday Night
A 50 percent chance of snow before midnight. Cloudy, with a low around 19.
Monday
Mostly cloudy, with a high near 36.
Monday Night
A chance of rain before midnight, then a chance of snow. Mostly cloudy, with a low around 21. Chance of precipitation is 30%.
Tuesday
A 30 percent chance of rain. Cloudy, with a high near 41.
Tuesday Night
Mostly cloudy, with a low around 25.
Wednesday
A 30 percent chance of rain. Mostly cloudy, with a high near 46.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSW Bonaparte IA
 40.64°N 91.82°W (Elev. 600 ft)
Last Update:
8:07 am CST Feb 26, 2026
Forecast Valid:
9am CST Feb 26, 2026-6pm CST Mar 4, 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