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

63°F

17°C

Humidity 37%
Wind Speed SE 12 G 23 mph
Barometer 29.93 in (1013.5 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Last update 14 Mar 2:53 pm CDT
Extended Forecast for

Madison IL

Wind Advisory March 15, 10:00am until March 16, 12:00pm
Click here for hazard details and duration
Wind Advisory

  • Tonight

    Tonight: Increasing clouds, with a low around 56. South wind 9 to 14 mph, with gusts as high as 25 mph.

    Low: 56 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Rain and thunderstorms likely before 3pm, then rain and possibly a thunderstorm between 3pm and 4pm, then rain after 4pm. High near 68. Breezy, with a south wind 18 to 22 mph, with gusts as high as 39 mph. Chance of precipitation is 90%.

    High: 68 °F

    Breezy.
    Slight Chance
    T-storms then
    Rain

  • Sunday Night

    Sunday Night: Rain before 10pm, then a chance of snow. Low around 21. Blustery, with a west wind 25 to 28 mph, with gusts as high as 46 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    Low: 21 °F

    Rain/Snow and
    Breezy then
    Chance Snow
    and Blustery

  • Monday

    Monday: Mostly cloudy, with a high near 30. Blustery, with a northwest wind 21 to 26 mph, with gusts as high as 41 mph.

    High: 30 °F

    Mostly Cloudy
    and Blustery

  • Monday Night

    Monday Night: Mostly clear, with a low around 15. Northwest wind 8 to 16 mph, with gusts as high as 26 mph.

    Low: 15 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 38.

    High: 38 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A chance of rain and snow after 1am. Mostly cloudy, with a low around 33. Chance of precipitation is 30%.

    Low: 33 °F

    Mostly Cloudy
    then Chance
    Rain/Snow

  • Wednesday

    Wednesday: Mostly sunny, with a high near 66.

    High: 66 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 41.

    Low: 41 °F

    Mostly Clear

Detailed Forecast

Tonight
Increasing clouds, with a low around 56. South wind 9 to 14 mph, with gusts as high as 25 mph.
Sunday
Rain and thunderstorms likely before 3pm, then rain and possibly a thunderstorm between 3pm and 4pm, then rain after 4pm. High near 68. Breezy, with a south wind 18 to 22 mph, with gusts as high as 39 mph. Chance of precipitation is 90%.
Sunday Night
Rain before 10pm, then a chance of snow. Low around 21. Blustery, with a west wind 25 to 28 mph, with gusts as high as 46 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Monday
Mostly cloudy, with a high near 30. Blustery, with a northwest wind 21 to 26 mph, with gusts as high as 41 mph.
Monday Night
Mostly clear, with a low around 15. Northwest wind 8 to 16 mph, with gusts as high as 26 mph.
Tuesday
Mostly sunny, with a high near 38.
Tuesday Night
A chance of rain and snow after 1am. Mostly cloudy, with a low around 33. Chance of precipitation is 30%.
Wednesday
Mostly sunny, with a high near 66.
Wednesday Night
Mostly clear, with a low around 41.
Thursday
Sunny, with a high near 74.
Thursday Night
Partly cloudy, with a low around 48.
Friday
Sunny, with a high near 75.
Friday Night
Partly cloudy, with a low around 50.
Saturday
Mostly sunny, with a high near 79.
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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:
1:56 pm CDT Mar 14, 2026
Forecast Valid:
3pm CDT Mar 14, 2026-6pm CDT Mar 21, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation