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.

A Few Clouds

16°F

-9°C

Humidity 54%
Wind Speed W 12 G 20 mph
Barometer 30.31 in (1026.9 mb)
Dewpoint 2°F (-17°C)
Visibility 10.00 mi
Wind Chill3°F (-16°C)
Last update 17 Jan 7:53 pm CST
Extended Forecast for

Madison IL

  • Tonight

    Tonight: A chance of flurries before 11pm. Partly cloudy, with a low around 14. West wind 7 to 13 mph, with gusts as high as 22 mph.

    Low: 14 °F

    Chance
    Flurries

  • Sunday

    Sunday: A chance of flurries before 2pm, then a slight chance of snow between 2pm and 3pm, then a chance of flurries after 3pm. Increasing clouds, with a high near 34. Southwest wind 6 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.

    High: 34 °F

    Mostly Sunny
    then Slight
    Chance Snow

  • Sunday Night

    Sunday Night: A chance of flurries before 9pm. Partly cloudy, with a low around 13. Northwest wind 10 to 18 mph, with gusts as high as 28 mph.

    Low: 13 °F

    Chance
    Flurries

  • M.L.King Day

    M.L.King Day: Mostly sunny, with a high near 23. Northwest wind 7 to 15 mph, with gusts as high as 26 mph.

    High: 23 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 12. Northwest wind around 6 mph becoming calm.

    Low: 12 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 38.

    High: 38 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 29.

    Low: 29 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 45.

    High: 45 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 23.

    Low: 23 °F

    Partly Cloudy

Detailed Forecast

Tonight
A chance of flurries before 11pm. Partly cloudy, with a low around 14. West wind 7 to 13 mph, with gusts as high as 22 mph.
Sunday
A chance of flurries before 2pm, then a slight chance of snow between 2pm and 3pm, then a chance of flurries after 3pm. Increasing clouds, with a high near 34. Southwest wind 6 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.
Sunday Night
A chance of flurries before 9pm. Partly cloudy, with a low around 13. Northwest wind 10 to 18 mph, with gusts as high as 28 mph.
M.L.King Day
Mostly sunny, with a high near 23. Northwest wind 7 to 15 mph, with gusts as high as 26 mph.
Monday Night
Mostly clear, with a low around 12. Northwest wind around 6 mph becoming calm.
Tuesday
Mostly sunny, with a high near 38.
Tuesday Night
Partly cloudy, with a low around 29.
Wednesday
Mostly sunny, with a high near 45.
Wednesday Night
Partly cloudy, with a low around 23.
Thursday
Sunny, with a high near 38.
Thursday Night
Partly cloudy, with a low around 25.
Friday
Mostly sunny, with a high near 45.
Friday Night
A chance of rain and snow. Mostly cloudy, with a low around 22. Chance of precipitation is 30%.
Saturday
A 40 percent chance of snow. Mostly cloudy, with a high near 32.
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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:
5:01 pm CST Jan 17, 2026
Forecast Valid:
8pm CST Jan 17, 2026-6pm CST Jan 24, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation