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

32°F

0°C

Humidity 32%
Wind Speed S 7 mph
Barometer 29.96 in (1014.9 mb)
Dewpoint 5°F (-15°C)
Visibility 10.00 mi
Wind Chill25°F (-4°C)
Last update 15 Jan 3:53 pm CST
Extended Forecast for

Madison IL

  • Tonight

    Tonight: A chance of snow between 9pm and midnight. Partly cloudy during the early evening, then becoming cloudy, with a temperature rising to around 35 by 4am. South wind 6 to 8 mph becoming southwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 40%.

    Low: 30 °F⇑

    Chance Snow
    then Mostly
    Cloudy

  • Friday

    Friday: A chance of sprinkles between 3pm and 4pm, then a slight chance of rain after 4pm. Mostly cloudy, with a high near 45. West wind 8 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 20%.

    High: 45 °F

    Partly Sunny
    then Slight
    Chance Rain

  • Friday Night

    Friday Night: A 40 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 22. West wind 11 to 14 mph, with gusts as high as 23 mph.

    Low: 22 °F

    Chance Snow

  • Saturday

    Saturday: Partly sunny, with a high near 28. West wind 11 to 14 mph, with gusts as high as 23 mph.

    High: 28 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 12. Northwest wind 6 to 10 mph.

    Low: 12 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 31.

    High: 31 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 15.

    Low: 15 °F

    Partly Cloudy

  • M.L.King Day

    M.L.King Day: Sunny, with a high near 24.

    High: 24 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 11.

    Low: 11 °F

    Mostly Clear

Detailed Forecast

Tonight
A chance of snow between 9pm and midnight. Partly cloudy during the early evening, then becoming cloudy, with a temperature rising to around 35 by 4am. South wind 6 to 8 mph becoming southwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 40%.
Friday
A chance of sprinkles between 3pm and 4pm, then a slight chance of rain after 4pm. Mostly cloudy, with a high near 45. West wind 8 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 20%.
Friday Night
A 40 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 22. West wind 11 to 14 mph, with gusts as high as 23 mph.
Saturday
Partly sunny, with a high near 28. West wind 11 to 14 mph, with gusts as high as 23 mph.
Saturday Night
Mostly clear, with a low around 12. Northwest wind 6 to 10 mph.
Sunday
Mostly sunny, with a high near 31.
Sunday Night
Partly cloudy, with a low around 15.
M.L.King Day
Sunny, with a high near 24.
Monday Night
Mostly clear, with a low around 11.
Tuesday
Sunny, with a high near 36.
Tuesday Night
Mostly clear, with a low around 25.
Wednesday
Mostly sunny, with a high near 45.
Wednesday Night
Partly cloudy, with a low around 23.
Thursday
Partly sunny, with a high near 42.
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:
4:46 pm CST Jan 15, 2026
Forecast Valid:
5pm CST Jan 15, 2026-6pm CST Jan 22, 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