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.

Overcast

52°F

11°C

Humidity 82%
Wind Speed SE 3 mph
Barometer 29.97 in
Dewpoint 46°F (8°C)
Visibility 7.00 mi
Last update 5 Mar 2:55 pm CST
Extended Forecast for

Pontoosuc IL

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 58. South wind around 5 mph.

    High: 58 °F

    Partly Sunny

  • Tonight

    Tonight: A slight chance of rain before 3am, then a chance of rain and thunderstorms between 3am and 4am, then rain likely and possibly a thunderstorm after 4am. Areas of dense fog after 8pm. Otherwise, mostly cloudy, with a low around 49. Southeast wind 5 to 15 mph. Chance of precipitation is 60%.

    Low: 49 °F

    Areas Fog
    then Rain
    Likely and
    Areas Dense
    Fog

  • Friday

    Friday: Rain and thunderstorms, mainly before 3pm. Areas of fog before 8am. High near 73. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.

    High: 73 °F

    Rain and
    Areas Fog
    then Chance
    Rain

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm. Low around 46. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 100%.

    Low: 46 °F

    T-storms and
    Breezy

  • Saturday

    Saturday: Partly sunny, with a high near 57.

    High: 57 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 37.

    Low: 37 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 63.

    High: 63 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 50.

    Low: 50 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 73.

    High: 73 °F

    Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a high near 58. South wind around 5 mph.
Tonight
A slight chance of rain before 3am, then a chance of rain and thunderstorms between 3am and 4am, then rain likely and possibly a thunderstorm after 4am. Areas of dense fog after 8pm. Otherwise, mostly cloudy, with a low around 49. Southeast wind 5 to 15 mph. Chance of precipitation is 60%.
Friday
Rain and thunderstorms, mainly before 3pm. Areas of fog before 8am. High near 73. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.
Friday Night
Showers and possibly a thunderstorm. Low around 46. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 100%.
Saturday
Partly sunny, with a high near 57.
Saturday Night
Mostly clear, with a low around 37.
Sunday
Sunny, with a high near 63.
Sunday Night
Clear, with a low around 50.
Monday
Sunny, with a high near 73.
Monday Night
Partly cloudy, with a low around 56.
Tuesday
Rain likely. Partly sunny, with a high near 73. Chance of precipitation is 70%.
Tuesday Night
Rain and possibly a thunderstorm. Low around 46. Breezy. Chance of precipitation is 80%.
Wednesday
A 40 percent chance of rain. Mostly cloudy, with a high near 54.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Pontoosuc IL
 40.61°N 91.21°W (Elev. 643 ft)
Last Update:
1:36 pm CST Mar 5, 2026
Forecast Valid:
3pm CST Mar 5, 2026-6pm CDT Mar 11, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation