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

70°F

21°C

Humidity 100%
Wind Speed S 7 mph
Barometer 30.05 in
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Last update 9 Sep 11:55 pm CDT
Extended Forecast for

Fort Madison IA

  • Overnight

    Overnight: A 30 percent chance of showers and thunderstorms, mainly between 1am and 2am. Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 69. Calm wind.

    Low: 69 °F

    Chance
    T-storms and
    Patchy Fog

  • Thursday

    Thursday: A 20 percent chance of showers before 10am. Patchy fog before 9am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 81. Northeast wind around 5 mph.

    High: 81 °F

    Slight Chance
    Showers and
    Patchy Fog
    then Partly
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 63. Northeast wind around 5 mph becoming calm.

    Low: 63 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 84. Southeast wind around 5 mph.

    High: 84 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 68.

    Low: 68 °F

    Mostly Clear

  • Saturday

    Saturday: A 40 percent chance of showers. Mostly sunny, with a high near 85.

    High: 85 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 67.

    Low: 67 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 85.

    High: 85 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 71.

    Low: 71 °F

    Partly Cloudy

Detailed Forecast

Overnight
A 30 percent chance of showers and thunderstorms, mainly between 1am and 2am. Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 69. Calm wind.
Thursday
A 20 percent chance of showers before 10am. Patchy fog before 9am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 81. Northeast wind around 5 mph.
Thursday Night
Mostly clear, with a low around 63. Northeast wind around 5 mph becoming calm.
Friday
Sunny, with a high near 84. Southeast wind around 5 mph.
Friday Night
Mostly clear, with a low around 68.
Saturday
A 40 percent chance of showers. Mostly sunny, with a high near 85.
Saturday Night
Partly cloudy, with a low around 67.
Sunday
Partly sunny, with a high near 85.
Sunday Night
Partly cloudy, with a low around 71.
Monday
A 30 percent chance of showers after 1pm. Mostly sunny, with a high near 91.
Monday Night
Showers likely and possibly a thunderstorm. Partly cloudy, with a low around 69. Chance of precipitation is 60%.
Tuesday
A 40 percent chance of showers. Partly sunny, with a high near 80.
Tuesday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 65.
Wednesday
A 50 percent chance of showers. Partly sunny, with a high near 80.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Fort Madison IA
 40.61°N 91.36°W (Elev. 518 ft)
Last Update:
6:56 pm CDT Sep 9, 2026
Forecast Valid:
12am CDT Sep 10, 2026-6pm CDT Sep 16, 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