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.

Fair

76°F

24°C

Humidity 29%
Wind Speed S 15 G 24 mph
Barometer 29.83 in (1010.1 mb)
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Heat Index77°F (25°C)
Last update 3 May 3:53 pm CDT
Extended Forecast for

Madison ILSimilar City Names

  • Tonight

    Tonight: A chance of showers and thunderstorms. Partly cloudy, with a low around 58. South wind 5 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 50%.

    Low: 58 °F

    Chance
    T-storms

  • Monday

    Monday: A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 82. Southwest wind 8 to 14 mph, with gusts as high as 24 mph.

    High: 82 °F

    Chance
    T-storms

  • Monday Night

    Monday Night: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 10pm. Low around 58. South wind 6 to 10 mph. Chance of precipitation is 90%.

    Low: 58 °F

    T-storms
    Likely then
    Showers

  • Tuesday

    Tuesday: Showers and possibly a thunderstorm before 10am, then showers between 10am and 1pm, then showers and possibly a thunderstorm after 1pm. High near 66. South wind 6 to 13 mph becoming north in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 100%.

    High: 66 °F

    Showers

  • Tuesday Night

    Tuesday Night: Showers likely, mainly before 1am. Mostly cloudy, with a low around 46. North wind 6 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 70%.

    Low: 46 °F

    Showers
    Likely

  • Wednesday

    Wednesday: A 20 percent chance of showers before 1pm. Partly sunny, with a high near 60.

    High: 60 °F

    Slight Chance
    Showers

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 45.

    Low: 45 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 67.

    High: 67 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 48.

    Low: 48 °F

    Mostly Clear

Detailed Forecast

Tonight
A chance of showers and thunderstorms. Partly cloudy, with a low around 58. South wind 5 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 50%.
Monday
A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 82. Southwest wind 8 to 14 mph, with gusts as high as 24 mph.
Monday Night
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 10pm. Low around 58. South wind 6 to 10 mph. Chance of precipitation is 90%.
Tuesday
Showers and possibly a thunderstorm before 10am, then showers between 10am and 1pm, then showers and possibly a thunderstorm after 1pm. High near 66. South wind 6 to 13 mph becoming north in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 100%.
Tuesday Night
Showers likely, mainly before 1am. Mostly cloudy, with a low around 46. North wind 6 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 70%.
Wednesday
A 20 percent chance of showers before 1pm. Partly sunny, with a high near 60.
Wednesday Night
Mostly cloudy, with a low around 45.
Thursday
Mostly sunny, with a high near 67.
Thursday Night
Mostly clear, with a low around 48.
Friday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 73.
Friday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 51.
Saturday
Sunny, with a high near 76.
Saturday Night
Mostly clear, with a low around 55.
Sunday
A 30 percent chance of showers. Mostly sunny, with a high near 78.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Madison ILSimilar City Names
 38.68°N 90.14°W (Elev. 407 ft)
Last Update:
2:41 pm CDT May 3, 2026
Forecast Valid:
4pm CDT May 3, 2026-6pm CDT May 10, 2026
 
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Additional Resources

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Chance of Precipitation