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

68°F

20°C

Humidity 94%
Wind Speed N 3 mph
Barometer 29.94 in
Dewpoint 66°F (19°C)
Visibility 9.00 mi
Last update 14 Jun 12:15 am CDT
Extended Forecast for

Pontoosuc IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 68. Northeast wind around 5 mph.

    Low: 68 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, then gradually becoming sunny, with a high near 80. Northeast wind around 5 mph.

    High: 80 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 65. East wind around 5 mph.

    Low: 65 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 82. East wind around 5 mph.

    High: 82 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A 30 percent chance of showers after 1am. Mostly cloudy, with a low around 68.

    Low: 68 °F

    Mostly Cloudy
    then Chance
    Showers

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 83.

    High: 83 °F

    Partly Sunny
    then Chance
    T-storms

  • Monday Night

    Monday Night: A 30 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 70.

    Low: 70 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 85.

    High: 85 °F

    Partly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 72. Chance of precipitation is 60%.

    Low: 72 °F

    Chance
    T-storms then
    Showers
    Likely

Detailed Forecast

Overnight
Mostly cloudy, with a low around 68. Northeast wind around 5 mph.
Saturday
Mostly cloudy, then gradually becoming sunny, with a high near 80. Northeast wind around 5 mph.
Saturday Night
Mostly clear, with a low around 65. East wind around 5 mph.
Sunday
Mostly sunny, with a high near 82. East wind around 5 mph.
Sunday Night
A 30 percent chance of showers after 1am. Mostly cloudy, with a low around 68.
Monday
A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 83.
Monday Night
A 30 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 70.
Tuesday
A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 85.
Tuesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 72. Chance of precipitation is 60%.
Wednesday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 82. Chance of precipitation is 70%.
Wednesday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 67.
Juneteenth
Sunny, with a high near 80.
Thursday Night
Mostly clear, with a low around 66.
Friday
Sunny, with a high near 83.
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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:
9:47 pm CDT Jun 13, 2025
Forecast Valid:
12am CDT Jun 14, 2025-6pm CDT Jun 20, 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