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

27°F

-3°C

Humidity 46%
Wind Speed NW 17 G 30 mph
Barometer 30.13 in (1020.5 mb)
Dewpoint 9°F (-13°C)
Visibility 10.00 mi
Wind Chill14°F (-10°C)
Last update 14 Jan 9:53 pm CST
Extended Forecast for

Madison IL

  • Tonight

    Tonight: Clear, with a low around 18. Northwest wind 7 to 10 mph, with gusts as high as 23 mph.

    Low: 18 °F

    Clear

  • Thursday

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

    High: 36 °F

    Sunny

  • Thursday Night

    Thursday Night: A slight chance of snow between 9pm and midnight. Mostly cloudy, with a steady temperature around 33. South wind 5 to 8 mph becoming west after midnight. Chance of precipitation is 20%.

    Low: 33 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 46. West wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 46 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: A 20 percent chance of snow showers. Mostly cloudy, with a low around 21. West wind 10 to 14 mph, with gusts as high as 22 mph.

    Low: 21 °F

    Slight Chance
    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 9.

    Low: 9 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 26.

    High: 26 °F

    Mostly Sunny

  • Sunday Night

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

    Low: 16 °F

    Partly Cloudy

Detailed Forecast

Tonight
Clear, with a low around 18. Northwest wind 7 to 10 mph, with gusts as high as 23 mph.
Thursday
Sunny, with a high near 36. Northwest wind around 6 mph becoming south in the afternoon.
Thursday Night
A slight chance of snow between 9pm and midnight. Mostly cloudy, with a steady temperature around 33. South wind 5 to 8 mph becoming west after midnight. Chance of precipitation is 20%.
Friday
Mostly cloudy, with a high near 46. West wind 10 to 15 mph, with gusts as high as 25 mph.
Friday Night
A 20 percent chance of snow showers. Mostly cloudy, with a low around 21. West wind 10 to 14 mph, with gusts as high as 22 mph.
Saturday
Partly sunny, with a high near 27.
Saturday Night
Partly cloudy, with a low around 9.
Sunday
Mostly sunny, with a high near 26.
Sunday Night
Partly cloudy, with a low around 16.
M.L.King Day
Mostly sunny, with a high near 27.
Monday Night
Mostly clear, with a low around 12.
Tuesday
Sunny, with a high near 34.
Tuesday Night
Mostly clear, with a low around 21.
Wednesday
Mostly sunny, with a high near 43.
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:
9:31 pm CST Jan 14, 2026
Forecast Valid:
10pm CST Jan 14, 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