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

68°F

20°C

Humidity 68%
Wind Speed SW 14 G 29 mph
Barometer 29.85 in (1010.6 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 9 Mar 11:53 am CDT
Extended Forecast for

Madison ILSimilar City Names

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 79. South wind 14 to 16 mph, with gusts as high as 25 mph.

    High: 79 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 61. South wind 6 to 10 mph, with gusts as high as 21 mph.

    Low: 61 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 82. South wind 6 to 16 mph, with gusts as high as 25 mph.

    High: 82 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 10pm. Low around 56. Southwest wind 10 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 90%.

    Low: 56 °F

    Showers
    Likely then
    T-storms

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. Temperature rising to near 65 by 10am, then falling to around 50 during the remainder of the day. Southwest wind 11 to 17 mph becoming northwest in the afternoon. Winds could gust as high as 29 mph. Chance of precipitation is 100%.

    High: 65 °F⇓

    Showers

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 34.

    Low: 34 °F

    Mostly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 56.

    High: 56 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 45.

    Low: 45 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 65.

    High: 65 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 79. South wind 14 to 16 mph, with gusts as high as 25 mph.
Tonight
Partly cloudy, with a low around 61. South wind 6 to 10 mph, with gusts as high as 21 mph.
Tuesday
Mostly sunny, with a high near 82. South wind 6 to 16 mph, with gusts as high as 25 mph.
Tuesday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 10pm. Low around 56. Southwest wind 10 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 90%.
Wednesday
Showers and possibly a thunderstorm. Temperature rising to near 65 by 10am, then falling to around 50 during the remainder of the day. Southwest wind 11 to 17 mph becoming northwest in the afternoon. Winds could gust as high as 29 mph. Chance of precipitation is 100%.
Wednesday Night
Mostly cloudy, with a low around 34.
Thursday
Sunny, with a high near 56.
Thursday Night
Mostly cloudy, with a low around 45.
Friday
Partly sunny, with a high near 65.
Friday Night
Mostly cloudy, with a low around 40.
Saturday
Mostly sunny, with a high near 67.
Saturday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 50.
Sunday
A 50 percent chance of rain and thunderstorms. Mostly cloudy, with a high near 70.
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:
11:31 am CDT Mar 9, 2026
Forecast Valid:
12pm CDT Mar 9, 2026-6pm CDT Mar 15, 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