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.

Mostly Cloudy

46°F

8°C

Humidity 50%
Wind Speed W 7 mph
Barometer 30.17 in
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill42°F (6°C)
Last update 19 Apr 8:35 am CDT
Extended Forecast for

Fort Madison IA

Freeze Warning April 20, 12:00am until April 20, 09:00am
Click here for hazard details and duration
Freeze Warning

  • Today

    Today: Increasing clouds, with a high near 59. West wind 10 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 30 mph.

    High: 59 °F

    Increasing
    Clouds

  • Tonight

    Tonight: Widespread frost, mainly after 5am. Otherwise, mostly clear, with a low around 33. North wind 5 to 10 mph becoming northeast after midnight.

    Low: 33 °F

    Mostly Clear
    then Frost

  • Monday

    Monday: Widespread frost, mainly before 7am. Otherwise, sunny, with a high near 63. East wind 5 to 10 mph becoming south in the afternoon.

    High: 63 °F

    Frost then
    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 52. South wind around 10 mph, with gusts as high as 20 mph.

    Low: 52 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 59.

    Low: 59 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 81.

    High: 81 °F

    Mostly Sunny

Detailed Forecast

Today
Increasing clouds, with a high near 59. West wind 10 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 30 mph.
Tonight
Widespread frost, mainly after 5am. Otherwise, mostly clear, with a low around 33. North wind 5 to 10 mph becoming northeast after midnight.
Monday
Widespread frost, mainly before 7am. Otherwise, sunny, with a high near 63. East wind 5 to 10 mph becoming south in the afternoon.
Monday Night
Mostly clear, with a low around 52. South wind around 10 mph, with gusts as high as 20 mph.
Tuesday
Sunny, with a high near 78.
Tuesday Night
Mostly clear, with a low around 56.
Wednesday
Sunny, with a high near 79.
Wednesday Night
Partly cloudy, with a low around 59.
Thursday
Mostly sunny, with a high near 81.
Thursday Night
Showers likely and possibly a thunderstorm, then showers after 1am. Low around 56. Chance of precipitation is 80%.
Friday
Showers likely. Mostly cloudy, with a high near 69. Chance of precipitation is 60%.
Friday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 45.
Saturday
Mostly sunny, with a high near 65.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Fort Madison IA
 40.63°N 91.35°W (Elev. 541 ft)
Last Update:
8:37 am CDT Apr 19, 2026
Forecast Valid:
8am CDT Apr 19, 2026-6pm CDT Apr 25, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation