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

Hazardous Weather Conditions

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

Madison IL

  • Tonight

    Tonight: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4am. Cloudy, with a low around 50. Northeast wind 3 to 7 mph. Chance of precipitation is 70%.

    Low: 50 °F

    Showers
    Likely

  • Wednesday

    Wednesday: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 1pm. Patchy fog before noon. High near 65. Calm wind becoming west around 6 mph in the afternoon. Chance of precipitation is 100%.

    High: 65 °F

    Chance
    T-storms and
    Patchy Fog
    then Showers

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms before 1am, then showers and possibly a thunderstorm between 1am and 5am, then a chance of showers and thunderstorms after 5am. Patchy fog between 3am and 4am. Low around 55. East wind around 6 mph becoming light and variable. Chance of precipitation is 90%.

    Low: 55 °F

    T-storms then
    Showers and
    Patchy Fog

  • Thursday

    Thursday: Showers likely, mainly before noon. Cloudy, then gradually becoming mostly sunny, with a high near 69. West wind 5 to 8 mph becoming south in the afternoon. Chance of precipitation is 60%.

    High: 69 °F

    Showers
    Likely then
    Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers before 9pm, then a chance of showers and thunderstorms between 9pm and midnight, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 59. South wind 3 to 7 mph. Chance of precipitation is 60%.

    Low: 59 °F

    Showers
    Likely

  • Friday

    Friday: A chance of showers and thunderstorms. Partly sunny, with a high near 80. Chance of precipitation is 40%.

    High: 80 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after midnight. Low around 59. Chance of precipitation is 90%.

    Low: 59 °F

    Chance
    T-storms then
    Showers

  • Saturday

    Saturday: A 50 percent chance of showers, mainly before noon. Mostly cloudy, with a high near 69.

    High: 69 °F

    Chance
    Showers then
    Slight Chance
    Showers

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 44.

    Low: 44 °F

    Partly Cloudy

Detailed Forecast

Tonight
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4am. Cloudy, with a low around 50. Northeast wind 3 to 7 mph. Chance of precipitation is 70%.
Wednesday
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 1pm. Patchy fog before noon. High near 65. Calm wind becoming west around 6 mph in the afternoon. Chance of precipitation is 100%.
Wednesday Night
Showers and thunderstorms before 1am, then showers and possibly a thunderstorm between 1am and 5am, then a chance of showers and thunderstorms after 5am. Patchy fog between 3am and 4am. Low around 55. East wind around 6 mph becoming light and variable. Chance of precipitation is 90%.
Thursday
Showers likely, mainly before noon. Cloudy, then gradually becoming mostly sunny, with a high near 69. West wind 5 to 8 mph becoming south in the afternoon. Chance of precipitation is 60%.
Thursday Night
A chance of showers before 9pm, then a chance of showers and thunderstorms between 9pm and midnight, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 59. South wind 3 to 7 mph. Chance of precipitation is 60%.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 80. Chance of precipitation is 40%.
Friday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after midnight. Low around 59. Chance of precipitation is 90%.
Saturday
A 50 percent chance of showers, mainly before noon. Mostly cloudy, with a high near 69.
Saturday Night
Partly cloudy, with a low around 44.
Sunday
Sunny, with a high near 70.
Sunday Night
Partly cloudy, with a low around 49.
Monday
Sunny, with a high near 77.
Monday Night
A 30 percent chance of showers and thunderstorms. Mostly clear, with a low around 59.
Tuesday
Showers and thunderstorms likely. Partly sunny, with a high near 78. Chance of precipitation is 60%.
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ABOUT THIS FORECAST

 
Point Forecast:
Madison IL
 38.68°N 90.14°W (Elev. 407 ft)
Last Update:
10:26 pm CST Mar 3, 2026
Forecast Valid:
11pm CST Mar 3, 2026-6pm CDT Mar 10, 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