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

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

64°F

18°C

Humidity 96%
Wind Speed Calm
Barometer 30.04 in (1017.1 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 22 Aug 3:53 am CDT
Extended Forecast for

Madison IL

  • Today

    Today: Patchy fog between 7am and 8am. Otherwise, sunny, with a high near 87. Calm wind becoming northeast around 5 mph in the afternoon.

    High: 87 °F

    Patchy Fog
    then Sunny

  • Tonight

    Tonight: Patchy fog after 4am. Otherwise, mostly clear, with a low around 66. Light and variable wind.

    Low: 66 °F

    Mostly Clear
    then Patchy
    Fog

  • Saturday

    Saturday: Patchy fog before 8am. Otherwise, increasing clouds, with a high near 89. Calm wind becoming northwest 5 to 8 mph in the afternoon.

    High: 89 °F

    Patchy Fog
    then Partly
    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, then gradually becoming clear, with a low around 61. North wind around 6 mph.

    Low: 61 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: Sunny, with a high near 82. Northwest wind 5 to 10 mph.

    High: 82 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 78.

    High: 78 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 56.

    Low: 56 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 78.

    High: 78 °F

    Mostly Sunny

Detailed Forecast

Today
Patchy fog between 7am and 8am. Otherwise, sunny, with a high near 87. Calm wind becoming northeast around 5 mph in the afternoon.
Tonight
Patchy fog after 4am. Otherwise, mostly clear, with a low around 66. Light and variable wind.
Saturday
Patchy fog before 8am. Otherwise, increasing clouds, with a high near 89. Calm wind becoming northwest 5 to 8 mph in the afternoon.
Saturday Night
Mostly cloudy, then gradually becoming clear, with a low around 61. North wind around 6 mph.
Sunday
Sunny, with a high near 82. Northwest wind 5 to 10 mph.
Sunday Night
Mostly clear, with a low around 60.
Monday
Mostly sunny, with a high near 78.
Monday Night
Partly cloudy, with a low around 56.
Tuesday
Mostly sunny, with a high near 78.
Tuesday Night
Mostly clear, with a low around 55.
Wednesday
Sunny, with a high near 81.
Wednesday Night
Partly cloudy, with a low around 58.
Thursday
Mostly sunny, with a high near 82.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Madison IL
 38.68°N 90.14°W (Elev. 407 ft)
Last Update:
2:41 am CDT Aug 22, 2025
Forecast Valid:
4am CDT Aug 22, 2025-6pm CDT Aug 28, 2025
 
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Additional Resources

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