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

85°F

29°C

Humidity 63%
Wind Speed SW 8 mph
Barometer 29.86 in (1010.9 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index90°F (32°C)
Last update 27 Jun 5:53 pm CDT
Extended Forecast for

2 Miles SE Cahokia IL

Extreme Heat Warning June 28, 12:00pm until July 3, 12:00am
Click here for hazard details and duration
Extreme Heat Warning

  • Tonight

    Tonight: A 40 percent chance of showers and thunderstorms, mainly between midnight and 5am. Partly cloudy, with a low around 72. Southwest wind around 5 mph becoming calm in the evening.

    Low: 72 °F

    Chance
    T-storms

  • Sunday

    Sunday: Partly sunny, then gradually becoming sunny, with a high near 93. Heat index values as high as 106. South wind 5 to 9 mph.

    High: 93 °F

    Becoming
    Sunny

  • Sunday Night

    Sunday Night: Increasing clouds, with a low around 75. South wind 5 to 8 mph.

    Low: 75 °F

    Increasing
    Clouds

  • Monday

    Monday: Mostly cloudy through mid morning, then becoming sunny, with a high near 95. Heat index values as high as 112. South wind 6 to 10 mph.

    High: 95 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 76. South wind 5 to 9 mph.

    Low: 76 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 96.

    High: 96 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 76.

    Low: 76 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 95.

    High: 95 °F

    Sunny

  • Wednesday Night

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

    Low: 77 °F

    Mostly Clear

Detailed Forecast

Tonight
A 40 percent chance of showers and thunderstorms, mainly between midnight and 5am. Partly cloudy, with a low around 72. Southwest wind around 5 mph becoming calm in the evening.
Sunday
Partly sunny, then gradually becoming sunny, with a high near 93. Heat index values as high as 106. South wind 5 to 9 mph.
Sunday Night
Increasing clouds, with a low around 75. South wind 5 to 8 mph.
Monday
Mostly cloudy through mid morning, then becoming sunny, with a high near 95. Heat index values as high as 112. South wind 6 to 10 mph.
Monday Night
Mostly clear, with a low around 76. South wind 5 to 9 mph.
Tuesday
Sunny, with a high near 96.
Tuesday Night
Clear, with a low around 76.
Wednesday
Sunny, with a high near 95.
Wednesday Night
Mostly clear, with a low around 77.
Thursday
Sunny, with a high near 94.
Thursday Night
Mostly clear, with a low around 76.
Friday
Sunny, with a high near 94.
Friday Night
A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 76.
Independence Day
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 93.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SE Cahokia IL
 38.53°N 90.15°W (Elev. 499 ft)
Last Update:
5:16 pm CDT Jun 27, 2026
Forecast Valid:
6pm CDT Jun 27, 2026-6pm CDT Jul 4, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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