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.

Fog/Mist

32°F

0°C

Humidity 100%
Wind Speed S 6 mph
Barometer 29.84 in
Dewpoint 32°F (0°C)
Visibility 4.00 mi
Wind Chill26°F (-3°C)
Last update 7 Jan 12:35 am CST
Extended Forecast for

Hamilton ILSimilar City Names

Dense Fog Advisory until January 7, 11:00am
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory until January 7, 11:00am

    NOW until 11:00am Wed

    Dense Fog Advisory

  • Overnight

    Low: 33 °F

    Areas Fog

  • Wednesday

    Wednesday: Widespread dense fog, mainly before 9am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 57. South wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 57 °F

    Dense Fog
    then Sunny

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 43. South wind 5 to 10 mph.

    Low: 43 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Rain. High near 57. Southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

    High: 57 °F

    Rain

  • Thursday Night

    Thursday Night: A 50 percent chance of rain before midnight. Mostly cloudy, with a low around 41.

    Low: 41 °F

    Chance Rain
    then Mostly
    Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 46.

    High: 46 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: A 40 percent chance of rain. Mostly cloudy, with a low around 33.

    Low: 33 °F

    Chance Rain

  • Saturday

    Saturday: A chance of rain and snow before noon, then a chance of snow. Partly sunny, with a high near 38. Chance of precipitation is 30%.

    High: 38 °F

    Chance
    Rain/Snow
    then Chance
    Snow

Detailed Forecast

Overnight
Areas of fog. Otherwise, mostly cloudy, with a low around 33. West wind around 5 mph becoming calm.
Wednesday
Widespread dense fog, mainly before 9am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 57. South wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday Night
Increasing clouds, with a low around 43. South wind 5 to 10 mph.
Thursday
Rain. High near 57. Southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Thursday Night
A 50 percent chance of rain before midnight. Mostly cloudy, with a low around 41.
Friday
Mostly cloudy, with a high near 46.
Friday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 33.
Saturday
A chance of rain and snow before noon, then a chance of snow. Partly sunny, with a high near 38. Chance of precipitation is 30%.
Saturday Night
Partly cloudy, with a low around 22.
Sunday
Mostly sunny, with a high near 34.
Sunday Night
Mostly clear, with a low around 26.
Monday
Sunny, with a high near 46.
Monday Night
Partly cloudy, with a low around 29.
Tuesday
Mostly sunny, with a high near 44.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Hamilton ILSimilar City Names
 40.39°N 91.36°W (Elev. 512 ft)
Last Update:
12:01 am CST Jan 7, 2026
Forecast Valid:
12am CST Jan 7, 2026-6pm CST Jan 13, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation