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

50°F

10°C

Humidity 66%
Wind Speed SE 7 mph
Barometer 29.91 in (1012.9 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Wind Chill47°F (8°C)
Last update 7 Jan 7:53 pm CST
Extended Forecast for

Madison IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 46. South wind 7 to 9 mph.

    Low: 46 °F

    Mostly Cloudy

  • Thursday

    Thursday: Rain and thunderstorms likely, then showers and possibly a thunderstorm after 4pm. High near 67. South wind 9 to 18 mph, with gusts as high as 33 mph. Chance of precipitation is 80%.

    High: 67 °F

    Showers

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm. Cloudy, then gradually becoming partly cloudy, with a low around 51. South wind 9 to 17 mph becoming west after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 70%.

    Low: 51 °F

    Showers
    Likely then
    Slight Chance
    Showers

  • Friday

    Friday: Partly sunny, with a high near 58. West wind 6 to 8 mph becoming north in the afternoon.

    High: 58 °F

    Partly Sunny

  • Friday Night

    Friday Night: A 40 percent chance of rain, mainly after midnight. Mostly cloudy, with a low around 39. North wind 3 to 8 mph.

    Low: 39 °F

    Chance Rain

  • Saturday

    Saturday: A 20 percent chance of rain before noon. Partly sunny, with a high near 46.

    High: 46 °F

    Slight Chance
    Rain then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 25.

    Low: 25 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 36.

    High: 36 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 24.

    Low: 24 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 46. South wind 7 to 9 mph.
Thursday
Rain and thunderstorms likely, then showers and possibly a thunderstorm after 4pm. High near 67. South wind 9 to 18 mph, with gusts as high as 33 mph. Chance of precipitation is 80%.
Thursday Night
Showers likely and possibly a thunderstorm. Cloudy, then gradually becoming partly cloudy, with a low around 51. South wind 9 to 17 mph becoming west after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 70%.
Friday
Partly sunny, with a high near 58. West wind 6 to 8 mph becoming north in the afternoon.
Friday Night
A 40 percent chance of rain, mainly after midnight. Mostly cloudy, with a low around 39. North wind 3 to 8 mph.
Saturday
A 20 percent chance of rain before noon. Partly sunny, with a high near 46.
Saturday Night
Partly cloudy, with a low around 25.
Sunday
Sunny, with a high near 36.
Sunday Night
Mostly clear, with a low around 24.
Monday
Sunny, with a high near 49.
Monday Night
Mostly clear, with a low around 34.
Tuesday
Mostly sunny, with a high near 53.
Tuesday Night
Mostly cloudy, with a low around 36.
Wednesday
A 20 percent chance of rain. Mostly cloudy, with a high near 44.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Madison IL
 38.68°N 90.14°W (Elev. 407 ft)
Last Update:
5:21 pm CST Jan 7, 2026
Forecast Valid:
8pm CST Jan 7, 2026-6pm CST Jan 14, 2026
 
Forecast Discussion
 
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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