National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Fort Madison Municipal Airport (KFSW)

Lat: 40.66°NLon: 91.33°WElev: 719ft.

Fair

81°F

27°C

Humidity 89%
Wind Speed Vrbl 5 mph
Barometer 30.01 in
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index88°F (31°C)
Last update 15 Aug 12:55 pm CDT
Extended Forecast for

Fort Madison IA

Flood Warning until August 15, 02:30pm
Click here for hazard details and duration
...
  •  
    Flood Warning until August 15, 02:30pm

    NOW until 2:30pm Sat

    Flood Warning

  • This Afternoon

    High: 86 °F

    Partly Sunny

  • Tonight

    Tonight: A chance of showers and thunderstorms before 1am, then showers likely and possibly a thunderstorm between 1am and 3am, then a chance of showers and thunderstorms after 3am. Increasing clouds, with a low around 74. Calm wind becoming west around 5 mph after midnight. Chance of precipitation is 70%.

    Low: 74 °F

    Chance
    T-storms then
    Showers
    Likely

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms, mainly between 4pm and 5pm. Partly sunny, with a high near 85. Northwest wind 5 to 10 mph.

    High: 85 °F

    Chance
    Showers then
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A 10 percent chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 67. North wind 5 to 10 mph.

    Low: 67 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 67.

    Low: 67 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 85.

    High: 85 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms, then showers after 1am. Low around 70. Chance of precipitation is 80%.

    Low: 70 °F

    Chance
    T-storms then
    Showers

Detailed Forecast

This Afternoon
Partly sunny, with a high near 86. Southwest wind around 5 mph.
Tonight
A chance of showers and thunderstorms before 1am, then showers likely and possibly a thunderstorm between 1am and 3am, then a chance of showers and thunderstorms after 3am. Increasing clouds, with a low around 74. Calm wind becoming west around 5 mph after midnight. Chance of precipitation is 70%.
Sunday
A 30 percent chance of showers and thunderstorms, mainly between 4pm and 5pm. Partly sunny, with a high near 85. Northwest wind 5 to 10 mph.
Sunday Night
A 10 percent chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 67. North wind 5 to 10 mph.
Monday
Sunny, with a high near 82.
Monday Night
Mostly clear, with a low around 67.
Tuesday
Mostly sunny, with a high near 85.
Tuesday Night
A chance of showers and thunderstorms, then showers after 1am. Low around 70. Chance of precipitation is 80%.
Wednesday
A 30 percent chance of showers before 1pm. Partly sunny, with a high near 80.
Wednesday Night
Partly cloudy, with a low around 64.
Thursday
Mostly sunny, with a high near 78.
Thursday Night
Partly cloudy, with a low around 64.
Friday
Mostly sunny, with a high near 80.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Fort Madison IA
 40.61°N 91.36°W (Elev. 518 ft)
Last Update:
11:56 am CDT Aug 15, 2026
Forecast Valid:
1pm CDT Aug 15, 2026-6pm CDT Aug 21, 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