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

64°F

18°C

Humidity 52%
Wind Speed NE 5 mph
Barometer 30.17 in
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 2 Jun 1:35 am CDT
Extended Forecast for

Pontoosuc IL

  • Overnight

    Overnight: Mostly clear, with a low around 58. Northeast wind around 5 mph.

    Low: 58 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 80. East wind 5 to 10 mph.

    High: 80 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 57. Southeast wind 5 to 10 mph.

    Low: 57 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 80. Southeast wind 5 to 10 mph.

    High: 80 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 84.

    High: 84 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 65.

    Low: 65 °F

    Partly Cloudy

  • Friday

    Friday: A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 84. Chance of precipitation is 50%.

    High: 84 °F

    Chance
    Showers then
    Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 66. Chance of precipitation is 60%.

    Low: 66 °F

    Chance
    T-storms then
    Showers
    Likely

Detailed Forecast

Overnight
Mostly clear, with a low around 58. Northeast wind around 5 mph.
Tuesday
Sunny, with a high near 80. East wind 5 to 10 mph.
Tuesday Night
Mostly clear, with a low around 57. Southeast wind 5 to 10 mph.
Wednesday
Sunny, with a high near 80. Southeast wind 5 to 10 mph.
Wednesday Night
Mostly clear, with a low around 59.
Thursday
Sunny, with a high near 84.
Thursday Night
Partly cloudy, with a low around 65.
Friday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 84. Chance of precipitation is 50%.
Friday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 66. Chance of precipitation is 60%.
Saturday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 88.
Saturday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 66.
Sunday
A 40 percent chance of showers. Partly sunny, with a high near 89.
Sunday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 67.
Monday
A 50 percent chance of showers. Partly sunny, with a high near 89.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Pontoosuc IL
 40.63°N 91.21°W (Elev. 531 ft)
Last Update:
1:26 am CDT Jun 2, 2026
Forecast Valid:
1am CDT Jun 2, 2026-6pm CDT Jun 8, 2026
 
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