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

32°F

0°C

Humidity 82%
Wind Speed Calm
Barometer 30.33 in (1027.3 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Last update 12 Mar 7:53 am CDT
Extended Forecast for

Madison IL

  • Today

    Today: Sunny, with a high near 57. Light and variable wind becoming southwest 5 to 10 mph in the morning.

    High: 57 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 45. South wind 10 to 18 mph, with gusts as high as 37 mph.

    Low: 45 °F

    Increasing
    Clouds

  • Friday

    Friday: Partly sunny, with a high near 61. West wind 15 to 17 mph, with gusts as high as 29 mph.

    High: 61 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 38. Northwest wind 5 to 7 mph becoming light and variable.

    Low: 38 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 64. Southeast wind 6 to 11 mph.

    High: 64 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 54.

    Low: 54 °F

    Mostly Cloudy

  • Sunday

    Sunday: Rain likely and possibly a thunderstorm, then rain after 1pm. High near 68. Breezy. Chance of precipitation is 80%.

    High: 68 °F

    Rain and
    Breezy

  • Sunday Night

    Sunday Night: Rain likely, possibly mixed with snow before 1am, then a chance of snow. Some thunder is also possible. Mostly cloudy, with a low around 23. Breezy. Chance of precipitation is 60%.

    Low: 23 °F

    Rain/Snow
    Likely and
    Breezy

  • Monday

    Monday: Mostly sunny, with a high near 34. Breezy.

    High: 34 °F

    Mostly Sunny
    and Breezy

Detailed Forecast

Today
Sunny, with a high near 57. Light and variable wind becoming southwest 5 to 10 mph in the morning.
Tonight
Increasing clouds, with a low around 45. South wind 10 to 18 mph, with gusts as high as 37 mph.
Friday
Partly sunny, with a high near 61. West wind 15 to 17 mph, with gusts as high as 29 mph.
Friday Night
Partly cloudy, with a low around 38. Northwest wind 5 to 7 mph becoming light and variable.
Saturday
Partly sunny, with a high near 64. Southeast wind 6 to 11 mph.
Saturday Night
Mostly cloudy, with a low around 54.
Sunday
Rain likely and possibly a thunderstorm, then rain after 1pm. High near 68. Breezy. Chance of precipitation is 80%.
Sunday Night
Rain likely, possibly mixed with snow before 1am, then a chance of snow. Some thunder is also possible. Mostly cloudy, with a low around 23. Breezy. Chance of precipitation is 60%.
Monday
Mostly sunny, with a high near 34. Breezy.
Monday Night
Mostly clear, with a low around 17.
Tuesday
Partly sunny, with a high near 40.
Tuesday Night
A slight chance of rain and snow. Mostly cloudy, with a low around 31. Chance of precipitation is 20%.
Wednesday
Mostly cloudy, with a high near 59.
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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:
5:56 am CDT Mar 12, 2026
Forecast Valid:
8am CDT Mar 12, 2026-6pm CDT Mar 18, 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