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

22°F

-6°C

Humidity 52%
Wind Speed N 14 mph
Barometer 30.12 in (1020.3 mb)
Dewpoint 7°F (-14°C)
Visibility 10.00 mi
Wind Chill9°F (-13°C)
Last update 15 Jan 2:53 am CST
Extended Forecast for

Madison IL

  • Overnight

    Overnight: Clear, with a low around 18. Northwest wind around 9 mph.

    Low: 18 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 36. Northwest wind 6 to 9 mph becoming south in the afternoon.

    High: 36 °F

    Sunny

  • Thursday Night

    Thursday Night: Snow likely before midnight, then scattered flurries after 5am. Cloudy, then gradually becoming partly cloudy, with a low around 30. South wind 6 to 9 mph becoming west after midnight. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Low: 30 °F

    Snow Likely
    then Mostly
    Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 45. West wind 10 to 14 mph, with gusts as high as 24 mph.

    High: 45 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Scattered snow showers. Mostly cloudy, with a low around 22. West wind 9 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 50%.

    Low: 22 °F

    Scattered
    Snow Showers

  • Saturday

    Saturday: Partly sunny, with a high near 27.

    High: 27 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 12.

    Low: 12 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 28.

    High: 28 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 16.

    Low: 16 °F

    Partly Cloudy

Detailed Forecast

Overnight
Clear, with a low around 18. Northwest wind around 9 mph.
Thursday
Sunny, with a high near 36. Northwest wind 6 to 9 mph becoming south in the afternoon.
Thursday Night
Snow likely before midnight, then scattered flurries after 5am. Cloudy, then gradually becoming partly cloudy, with a low around 30. South wind 6 to 9 mph becoming west after midnight. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Friday
Mostly cloudy, with a high near 45. West wind 10 to 14 mph, with gusts as high as 24 mph.
Friday Night
Scattered snow showers. Mostly cloudy, with a low around 22. West wind 9 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 50%.
Saturday
Partly sunny, with a high near 27.
Saturday Night
Partly cloudy, with a low around 12.
Sunday
Mostly sunny, with a high near 28.
Sunday Night
Partly cloudy, with a low around 16.
M.L.King Day
Mostly sunny, with a high near 26.
Monday Night
Mostly clear, with a low around 11.
Tuesday
Sunny, with a high near 32.
Tuesday Night
Partly cloudy, with a low around 21.
Wednesday
Mostly sunny, with a high near 45.
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:
3:16 am CST Jan 15, 2026
Forecast Valid:
3am CST Jan 15, 2026-6pm CST Jan 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