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.

Partly Cloudy

81°F

27°C

Humidity 58%
Wind Speed S 13 G 23 mph
Barometer 29.97 in (1014.5 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 3 Apr 12:53 pm CDT
Extended Forecast for

Madison ILSimilar City Names

  • This Afternoon

    This Afternoon: A 30 percent chance of showers and thunderstorms, mainly before 4pm. Mostly sunny, with a high near 81. South wind 13 to 16 mph, with gusts as high as 24 mph.

    High: 81 °F

    Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2am. Low around 57. South wind 9 to 13 mph becoming west after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 100%.

    Low: 57 °F

    Chance
    T-storms then
    Showers

  • Saturday

    Saturday: Showers, mainly before 11am. Temperature falling to around 57 by noon. West wind 8 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.

    High: 62 °F⇓

    Showers then
    Chance
    Showers

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 40. Northwest wind 7 to 14 mph, with gusts as high as 24 mph.

    Low: 40 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 60. Northwest wind 6 to 11 mph, with gusts as high as 20 mph.

    High: 60 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 42.

    Low: 42 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 62.

    High: 62 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 35.

    Low: 35 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 56.

    High: 56 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A 30 percent chance of showers and thunderstorms, mainly before 4pm. Mostly sunny, with a high near 81. South wind 13 to 16 mph, with gusts as high as 24 mph.
Tonight
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2am. Low around 57. South wind 9 to 13 mph becoming west after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 100%.
Saturday
Showers, mainly before 11am. Temperature falling to around 57 by noon. West wind 8 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.
Saturday Night
Mostly clear, with a low around 40. Northwest wind 7 to 14 mph, with gusts as high as 24 mph.
Sunday
Sunny, with a high near 60. Northwest wind 6 to 11 mph, with gusts as high as 20 mph.
Sunday Night
Clear, with a low around 42.
Monday
Sunny, with a high near 62.
Monday Night
Partly cloudy, with a low around 35.
Tuesday
Mostly sunny, with a high near 56.
Tuesday Night
Partly cloudy, with a low around 40.
Wednesday
Partly sunny, with a high near 72.
Wednesday Night
Partly cloudy, with a low around 53.
Thursday
A 20 percent chance of showers. Mostly sunny, with a high near 77.
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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:
11:51 am CDT Apr 3, 2026
Forecast Valid:
1pm CDT Apr 3, 2026-6pm CDT Apr 9, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation