National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

68°F

20°C

Humidity 76%
Wind Speed Calm
Barometer 30.05 in (1016.9 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 13 Sep 2:53 am CDT
Extended Forecast for

Madison IL

  • Overnight

    Overnight: Mostly clear, with a low around 70. Southeast wind around 5 mph.

    Low: 70 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny and hot, with a high near 99. Light and variable wind becoming southwest around 6 mph in the morning.

    High: 99 °F

    Hot

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 71. Southeast wind around 5 mph becoming calm in the evening.

    Low: 71 °F

    Partly Cloudy

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms after 4pm. Mostly sunny and hot, with a high near 99. Calm wind becoming northwest around 6 mph in the morning.

    High: 99 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms before 10pm. Partly cloudy, with a low around 71. Light and variable wind.

    Low: 71 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 96.

    High: 96 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Monday Night

    Monday Night: Partly cloudy, with a low around 70.

    Low: 70 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of showers after 1pm. Mostly sunny and hot, with a high near 97.

    High: 97 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 69.

    Low: 69 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 70. Southeast wind around 5 mph.
Saturday
Mostly sunny and hot, with a high near 99. Light and variable wind becoming southwest around 6 mph in the morning.
Saturday Night
Partly cloudy, with a low around 71. Southeast wind around 5 mph becoming calm in the evening.
Sunday
A 20 percent chance of showers and thunderstorms after 4pm. Mostly sunny and hot, with a high near 99. Calm wind becoming northwest around 6 mph in the morning.
Sunday Night
A 20 percent chance of showers and thunderstorms before 10pm. Partly cloudy, with a low around 71. Light and variable wind.
Monday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 96.
Monday Night
Partly cloudy, with a low around 70.
Tuesday
A 20 percent chance of showers after 1pm. Mostly sunny and hot, with a high near 97.
Tuesday Night
Partly cloudy, with a low around 69.
Wednesday
Mostly sunny, with a high near 95.
Wednesday Night
A 20 percent chance of showers. Partly cloudy, with a low around 69.
Thursday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 90.
Thursday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 67.
Friday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 87.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Madison IL
 38.68°N 90.17°W (Elev. 407 ft)
Last Update:
2:21 am CDT Sep 13, 2025
Forecast Valid:
3am CDT Sep 13, 2025-6pm CDT Sep 19, 2025
 
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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