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

53°F

12°C

Humidity 74%
Wind Speed SE 6 mph
Barometer 29.63 in (1003.2 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Wind Chill51°F (11°C)
Last update 15 Mar 2:53 am 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

  • Overnight

    Overnight: Mostly cloudy, with a low around 56. South wind around 14 mph, with gusts as high as 24 mph.

    Low: 56 °F

    Mostly Cloudy

  • Sunday

    Sunday: A chance of rain and thunderstorms, then rain and possibly a thunderstorm after 3pm. High near 68. Breezy, with a south wind 18 to 22 mph, with gusts as high as 41 mph. Chance of precipitation is 90%.

    High: 68 °F

    Breezy.
    Chance
    T-storms then
    Rain

  • Sunday Night

    Sunday Night: Rain and snow before 3am, then a slight chance of snow between 3am and 4am. Low around 22. Breezy, with a west wind 22 to 24 mph, with gusts as high as 45 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    Low: 22 °F

    Breezy.
    Rain/Snow
    then Chance
    Snow

  • Monday

    Monday: A slight chance of snow between 7am and 1pm. Mostly cloudy, with a high near 31. Blustery, with a northwest wind 20 to 24 mph, with gusts as high as 40 mph. Chance of precipitation is 20%.

    High: 31 °F

    Slight Chance
    Snow and
    Blustery

  • Monday Night

    Monday Night: Mostly clear, with a low around 15. Northwest wind 9 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 snow between 1am and 4am, then a chance of rain after 4am. Mostly cloudy, with a low around 32. Chance of precipitation is 30%.

    Low: 32 °F

    Mostly Cloudy
    then Chance
    Rain/Snow

  • Wednesday

    Wednesday: A 30 percent chance of rain before 7am. Partly sunny, with a high near 65.

    High: 65 °F

    Chance Rain
    then Mostly
    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 43.

    Low: 43 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 56. South wind around 14 mph, with gusts as high as 24 mph.
Sunday
A chance of rain and thunderstorms, then rain and possibly a thunderstorm after 3pm. High near 68. Breezy, with a south wind 18 to 22 mph, with gusts as high as 41 mph. Chance of precipitation is 90%.
Sunday Night
Rain and snow before 3am, then a slight chance of snow between 3am and 4am. Low around 22. Breezy, with a west wind 22 to 24 mph, with gusts as high as 45 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Monday
A slight chance of snow between 7am and 1pm. Mostly cloudy, with a high near 31. Blustery, with a northwest wind 20 to 24 mph, with gusts as high as 40 mph. Chance of precipitation is 20%.
Monday Night
Mostly clear, with a low around 15. Northwest wind 9 to 16 mph, with gusts as high as 26 mph.
Tuesday
Mostly sunny, with a high near 38.
Tuesday Night
A chance of snow between 1am and 4am, then a chance of rain after 4am. Mostly cloudy, with a low around 32. Chance of precipitation is 30%.
Wednesday
A 30 percent chance of rain before 7am. Partly sunny, with a high near 65.
Wednesday Night
Partly cloudy, with a low around 43.
Thursday
Sunny, with a high near 72.
Thursday Night
Mostly clear, with a low around 46.
Friday
Mostly sunny, with a high near 76.
Friday Night
Mostly cloudy, with a low around 50.
Saturday
Mostly sunny, with a high near 69.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Madison IL
 38.68°N 90.14°W (Elev. 407 ft)
Last Update:
2:11 am CDT Mar 15, 2026
Forecast Valid:
3am CDT Mar 15, 2026-6pm CDT Mar 21, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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