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.

A Few Clouds

87°F

31°C

Humidity 39%
Wind Speed Calm
Barometer 30.16 in (1020.9 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 3 Oct 2:53 pm CDT
Extended Forecast for

Madison IL

  • Tonight

    Tonight: Mostly clear, with a low around 63. South wind 3 to 6 mph.

    Low: 63 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 88. Light south wind increasing to 5 to 10 mph in the morning.

    High: 88 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 59. South wind 5 to 8 mph.

    Low: 59 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 88. South wind 6 to 13 mph, with gusts as high as 21 mph.

    High: 88 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 65. South wind 3 to 8 mph.

    Low: 65 °F

    Mostly Clear

  • Monday

    Monday: A slight chance of showers, then a chance of showers and thunderstorms after 10am. Mostly sunny, with a high near 86. Chance of precipitation is 30%.

    High: 86 °F

    Chance
    T-storms

  • Monday Night

    Monday Night: A 40 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 65.

    Low: 65 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 81. Chance of precipitation is 30%.

    High: 81 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 58.

    Low: 58 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 63. South wind 3 to 6 mph.
Saturday
Sunny, with a high near 88. Light south wind increasing to 5 to 10 mph in the morning.
Saturday Night
Clear, with a low around 59. South wind 5 to 8 mph.
Sunday
Sunny, with a high near 88. South wind 6 to 13 mph, with gusts as high as 21 mph.
Sunday Night
Mostly clear, with a low around 65. South wind 3 to 8 mph.
Monday
A slight chance of showers, then a chance of showers and thunderstorms after 10am. Mostly sunny, with a high near 86. Chance of precipitation is 30%.
Monday Night
A 40 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 65.
Tuesday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 81. Chance of precipitation is 30%.
Tuesday Night
Mostly cloudy, with a low around 58.
Wednesday
Sunny, with a high near 78.
Wednesday Night
Mostly clear, with a low around 53.
Thursday
Sunny, with a high near 77.
Thursday Night
Mostly clear, with a low around 52.
Friday
Sunny, with a high near 81.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Madison IL
 38.68°N 90.14°W (Elev. 407 ft)
Last Update:
2:36 pm CDT Oct 3, 2025
Forecast Valid:
3pm CDT Oct 3, 2025-6pm CDT Oct 10, 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