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

64°F

18°C

Humidity 84%
Wind Speed SW 8 mph
Barometer 29.77 in (1007.8 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 26 Dec 8:53 am CST
Extended Forecast for

Madison ILSimilar City Names

  • Today

    Today: Mostly cloudy, with a high near 66. West wind 6 to 10 mph.

    High: 66 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 46. Light and variable wind.

    Low: 46 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 68. Light southeast wind increasing to 5 to 10 mph in the morning.

    High: 68 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: A 30 percent chance of rain, mainly after midnight. Cloudy, with a low around 61. South wind 6 to 9 mph.

    Low: 61 °F

    Chance Rain

  • Sunday

    Sunday: Rain and possibly a thunderstorm. High near 72. South wind 6 to 14 mph becoming west in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 90%.

    High: 72 °F

    Rain Likely
    then Rain

  • Sunday Night

    Sunday Night: Rain likely, mixing with snow after 9pm, then gradually ending. Mostly cloudy, with a low around 22. Blustery. Chance of precipitation is 60%. Little or no snow accumulation expected.

    Low: 22 °F

    Rain/Snow
    Likely then
    Mostly Cloudy
    and Blustery

  • Monday

    Monday: Mostly sunny, with a high near 30. Blustery.

    High: 30 °F

    Mostly Sunny
    and Blustery
    then Mostly
    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 20.

    Low: 20 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 38.

    High: 38 °F

    Sunny

Detailed Forecast

Today
Mostly cloudy, with a high near 66. West wind 6 to 10 mph.
Tonight
Mostly cloudy, with a low around 46. Light and variable wind.
Saturday
Mostly cloudy, with a high near 68. Light southeast wind increasing to 5 to 10 mph in the morning.
Saturday Night
A 30 percent chance of rain, mainly after midnight. Cloudy, with a low around 61. South wind 6 to 9 mph.
Sunday
Rain and possibly a thunderstorm. High near 72. South wind 6 to 14 mph becoming west in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 90%.
Sunday Night
Rain likely, mixing with snow after 9pm, then gradually ending. Mostly cloudy, with a low around 22. Blustery. Chance of precipitation is 60%. Little or no snow accumulation expected.
Monday
Mostly sunny, with a high near 30. Blustery.
Monday Night
Mostly clear, with a low around 20.
Tuesday
Sunny, with a high near 38.
Tuesday Night
Partly cloudy, with a low around 28.
Wednesday
Partly sunny, with a high near 42.
Wednesday Night
Mostly cloudy, with a low around 23.
New Year's Day
Partly sunny, with a high near 37.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Madison ILSimilar City Names
 38.68°N 90.14°W (Elev. 407 ft)
Last Update:
8:26 am CST Dec 26, 2025
Forecast Valid:
9am CST Dec 26, 2025-6pm CST Jan 1, 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