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

45°F

7°C

Humidity 83%
Wind Speed Calm
Barometer 30.09 in (1019.1 mb)
Dewpoint 40°F (4°C)
Visibility 10.00 mi
Last update 16 Feb 8:53 am CST
Extended Forecast for

Madison ILSimilar City Names

  • Washington's Birthday

    Washington's Birthday: Mostly sunny, with a high near 65. South wind 6 to 10 mph.

    High: 65 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 43. South wind around 7 mph.

    Low: 43 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 65. South wind 6 to 16 mph, with gusts as high as 26 mph.

    High: 65 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers after midnight. Cloudy, then gradually becoming partly cloudy, with a low around 58. South wind 14 to 17 mph, with gusts as high as 30 mph.

    Low: 58 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Wednesday

    Wednesday: Sunny, with a high near 73. West wind 8 to 14 mph, with gusts as high as 25 mph.

    High: 73 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 48.

    Low: 48 °F

    Mostly Clear

  • Thursday

    Thursday: A slight chance of showers, then a chance of showers and thunderstorms after noon. Mostly sunny, with a high near 73. Chance of precipitation is 30%.

    High: 73 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A 20 percent chance of showers before midnight. Mostly clear, with a low around 39.

    Low: 39 °F

    Slight Chance
    Showers then
    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 52.

    High: 52 °F

    Mostly Sunny

Detailed Forecast

Washington's Birthday
Mostly sunny, with a high near 65. South wind 6 to 10 mph.
Tonight
Partly cloudy, with a low around 43. South wind around 7 mph.
Tuesday
Mostly cloudy, with a high near 65. South wind 6 to 16 mph, with gusts as high as 26 mph.
Tuesday Night
A 20 percent chance of showers after midnight. Cloudy, then gradually becoming partly cloudy, with a low around 58. South wind 14 to 17 mph, with gusts as high as 30 mph.
Wednesday
Sunny, with a high near 73. West wind 8 to 14 mph, with gusts as high as 25 mph.
Wednesday Night
Mostly clear, with a low around 48.
Thursday
A slight chance of showers, then a chance of showers and thunderstorms after noon. Mostly sunny, with a high near 73. Chance of precipitation is 30%.
Thursday Night
A 20 percent chance of showers before midnight. Mostly clear, with a low around 39.
Friday
Mostly sunny, with a high near 52.
Friday Night
A 20 percent chance of showers. Partly cloudy, with a low around 33.
Saturday
A 30 percent chance of showers. Partly sunny, with a high near 51.
Saturday Night
A 30 percent chance of showers. Partly cloudy, with a low around 30.
Sunday
A 20 percent chance of showers. 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 ILSimilar City Names
 38.68°N 90.14°W (Elev. 407 ft)
Last Update:
6:01 am CST Feb 16, 2026
Forecast Valid:
9am CST Feb 16, 2026-6pm CST Feb 22, 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