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

66°F

19°C

Humidity 46%
Wind Speed S 7 mph
Barometer 29.76 in
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 3 May 7:55 pm CDT
Extended Forecast for

Hamilton ILSimilar City Names

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 50. West wind around 5 mph becoming south after midnight.

    Low: 50 °F

    Decreasing
    Clouds

  • Monday

    Monday: A 10 percent chance of showers and thunderstorms after 5pm. Sunny, with a high near 81. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 81 °F

    Sunny then
    Slight Chance
    T-storms

  • Monday Night

    Monday Night: A slight chance of showers and thunderstorms before 7pm, then showers likely and possibly a thunderstorm between 7pm and 4am, then showers likely after 4am. Increasing clouds, with a low around 50. Southwest wind 5 to 10 mph becoming north after midnight. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 50 °F

    Showers
    Likely

  • Tuesday

    Tuesday: Showers likely. Cloudy, with a high near 58. North wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.

    High: 58 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 41.

    Low: 41 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 60.

    High: 60 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 40.

    Low: 40 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 65.

    High: 65 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 47.

    Low: 47 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 50. West wind around 5 mph becoming south after midnight.
Monday
A 10 percent chance of showers and thunderstorms after 5pm. Sunny, with a high near 81. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Monday Night
A slight chance of showers and thunderstorms before 7pm, then showers likely and possibly a thunderstorm between 7pm and 4am, then showers likely after 4am. Increasing clouds, with a low around 50. Southwest wind 5 to 10 mph becoming north after midnight. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday
Showers likely. Cloudy, with a high near 58. North wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
Tuesday Night
Mostly cloudy, with a low around 41.
Wednesday
Mostly cloudy, with a high near 60.
Wednesday Night
Mostly cloudy, with a low around 40.
Thursday
Mostly sunny, with a high near 65.
Thursday Night
Partly cloudy, with a low around 47.
Friday
A 30 percent chance of showers after 1pm. Partly sunny, with a high near 68.
Friday Night
Partly cloudy, with a low around 46.
Saturday
Sunny, with a high near 74.
Saturday Night
Partly cloudy, with a low around 52.
Sunday
A 30 percent chance of showers. Partly sunny, with a high near 76.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Hamilton ILSimilar City Names
 40.39°N 91.36°W (Elev. 512 ft)
Last Update:
5:51 pm CDT May 3, 2026
Forecast Valid:
8pm CDT May 3, 2026-6pm CDT May 10, 2026
 
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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