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

43°F

6°C

Humidity 87%
Wind Speed Vrbl 2 mph
Barometer 30.21 in
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Last update 23 Nov 9:15 am CST
Extended Forecast for

Hamilton IL

Dense Fog Advisory until November 23, 10:00am
Click here for hazard details and duration
...
  •  
    Dense Fog Advisory until November 23, 10:00am

    NOW until 10:00am Sun

    Dense Fog Advisory

  • Today

    High: 55 °F

    Sunny

  • Tonight

    Tonight: Patchy fog after 3am. Otherwise, increasing clouds, with a low around 42. South wind around 5 mph.

    Low: 42 °F

    Partly Cloudy
    then Patchy
    Fog

  • Monday

    Monday: Rain likely, mainly after noon. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 54. South wind 5 to 10 mph. Chance of precipitation is 60%.

    High: 54 °F

    Chance Rain
    and Patchy
    Fog then Rain
    Likely

  • Monday Night

    Monday Night: Rain likely. Cloudy, with a low around 48. Southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 70%.

    Low: 48 °F

    Rain Likely

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 59.

    High: 59 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 33.

    Low: 33 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 42.

    High: 42 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 25.

    Low: 25 °F

    Partly Cloudy

Detailed Forecast

Today
Sunny, with a high near 55. Calm wind becoming south around 5 mph in the afternoon.
Tonight
Patchy fog after 3am. Otherwise, increasing clouds, with a low around 42. South wind around 5 mph.
Monday
Rain likely, mainly after noon. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 54. South wind 5 to 10 mph. Chance of precipitation is 60%.
Monday Night
Rain likely. Cloudy, with a low around 48. Southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 70%.
Tuesday
Mostly cloudy, with a high near 59.
Tuesday Night
Partly cloudy, with a low around 33.
Wednesday
Sunny, with a high near 42.
Wednesday Night
Partly cloudy, with a low around 25.
Thanksgiving Day
Mostly sunny, with a high near 39.
Thursday Night
Partly cloudy, with a low around 24.
Friday
Partly sunny, with a high near 40.
Friday Night
A chance of rain and snow. Mostly cloudy, with a low around 29. Chance of precipitation is 30%.
Saturday
A 40 percent chance of rain. Mostly cloudy, with a high near 42.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Hamilton IL
 40.39°N 91.39°W (Elev. 574 ft)
Last Update:
8:51 am CST Nov 23, 2025
Forecast Valid:
9am CST Nov 23, 2025-6pm CST Nov 29, 2025
 
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