National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Tropical Moisture Will Bring Heavy to Excessive Rainfall with Possible Flooding This Week

Tropical moisture will surge over the southwest into the central U.S. this week with several days of heavy to excessive rainfall which may bring limited to considerable flooding. Isolated severe thunderstorm gusts and a couple of tornadoes will be possible from southeast New Mexico into west Texas. Read More >

Current conditions at

Fort Madison Municipal Airport (KFSW)

Lat: 40.66°NLon: 91.33°WElev: 719ft.

Fair

61°F

16°C

Humidity 68%
Wind Speed SE 5 mph
Barometer 30.02 in
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 28 Sep 10:15 pm CDT
Extended Forecast for

Pontoosuc IL

  • Tonight

    Tonight: Mostly clear, with a low around 56. Southeast wind around 5 mph.

    Low: 56 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 79. South wind 5 to 10 mph.

    High: 79 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 68. South wind 5 to 10 mph.

    Low: 68 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of showers before 10am, then a chance of showers and thunderstorms between 10am and 4pm, then a chance of showers after 4pm. Mostly cloudy, with a high near 77. South wind around 10 mph. Chance of precipitation is 40%.

    High: 77 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Showers likely, mainly after 1am. Cloudy, with a low around 69. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 69 °F

    Chance
    Showers then
    Showers
    Likely

  • Thursday

    Thursday: Showers before 10am, then showers and possibly a thunderstorm between 10am and 1pm, then showers after 1pm. High near 73. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.

    High: 73 °F

    Showers

  • Thursday Night

    Thursday Night: Showers likely, mainly before 1am. Mostly cloudy, with a low around 59. Chance of precipitation is 70%.

    Low: 59 °F

    Showers
    Likely

  • Friday

    Friday: A 40 percent chance of showers. Partly sunny, with a high near 68.

    High: 68 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A 30 percent chance of showers after 1am. Mostly cloudy, with a low around 56.

    Low: 56 °F

    Partly Cloudy
    then Chance
    Showers

Detailed Forecast

Tonight
Mostly clear, with a low around 56. Southeast wind around 5 mph.
Tuesday
Mostly sunny, with a high near 79. South wind 5 to 10 mph.
Tuesday Night
Mostly cloudy, with a low around 68. South wind 5 to 10 mph.
Wednesday
A chance of showers before 10am, then a chance of showers and thunderstorms between 10am and 4pm, then a chance of showers after 4pm. Mostly cloudy, with a high near 77. South wind around 10 mph. Chance of precipitation is 40%.
Wednesday Night
Showers likely, mainly after 1am. Cloudy, with a low around 69. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Thursday
Showers before 10am, then showers and possibly a thunderstorm between 10am and 1pm, then showers after 1pm. High near 73. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.
Thursday Night
Showers likely, mainly before 1am. Mostly cloudy, with a low around 59. Chance of precipitation is 70%.
Friday
A 40 percent chance of showers. Partly sunny, with a high near 68.
Friday Night
A 30 percent chance of showers after 1am. Mostly cloudy, with a low around 56.
Saturday
Partly sunny, with a high near 69.
Saturday Night
Mostly cloudy, with a low around 57.
Sunday
Mostly sunny, with a high near 69.
Sunday Night
Mostly clear, with a low around 53.
Monday
Sunny, with a high near 65.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Pontoosuc IL
 40.63°N 91.21°W (Elev. 531 ft)
Last Update:
7:41 pm CDT Sep 28, 2026
Forecast Valid:
10pm CDT Sep 28, 2026-6pm CDT Oct 5, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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