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

80°F

27°C

Humidity 56%
Wind Speed SW 3 mph
Barometer 30.02 in (1016.0 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 19 Jun 8:53 pm CDT
Extended Forecast for

Madison IL

Extreme Heat Watch June 21, 12:00pm until June 24, 09:00pm
Click here for hazard details and duration
Extreme Heat Watch

  • Tonight

    Tonight: Mostly clear, with a low around 68. Light and variable wind.

    Low: 68 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 93. South wind 5 to 10 mph.

    High: 93 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 76. South wind 8 to 11 mph, with gusts as high as 20 mph.

    Low: 76 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 98. Heat index values as high as 107. South wind 8 to 11 mph, with gusts as high as 21 mph.

    High: 98 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 78. South wind 6 to 10 mph.

    Low: 78 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 98.

    High: 98 °F

    Hot

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 77.

    Low: 77 °F

    Mostly Clear

  • Monday

    Monday: Sunny and hot, with a high near 98.

    High: 98 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 78.

    Low: 78 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 68. Light and variable wind.
Friday
Sunny, with a high near 93. South wind 5 to 10 mph.
Friday Night
Mostly clear, with a low around 76. South wind 8 to 11 mph, with gusts as high as 20 mph.
Saturday
Sunny and hot, with a high near 98. Heat index values as high as 107. South wind 8 to 11 mph, with gusts as high as 21 mph.
Saturday Night
Mostly clear, with a low around 78. South wind 6 to 10 mph.
Sunday
Sunny and hot, with a high near 98.
Sunday Night
Mostly clear, with a low around 77.
Monday
Sunny and hot, with a high near 98.
Monday Night
Mostly clear, with a low around 78.
Tuesday
A 20 percent chance of showers and thunderstorms before 1pm. Sunny and hot, with a high near 97.
Tuesday Night
Partly cloudy, with a low around 76.
Wednesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 95.
Wednesday Night
Partly cloudy, with a low around 77.
Thursday
A 30 percent chance of showers and thunderstorms. Sunny, with a high near 95.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Madison IL
 38.66°N 90.14°W (Elev. 407 ft)
Last Update:
5:52 pm CDT Jun 19, 2025
Forecast Valid:
9pm CDT Jun 19, 2025-6pm CDT Jun 26, 2025
 
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