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

89°F

32°C

Humidity 68%
Wind Speed S 13 G 20 mph
Barometer 29.97 in (1014.4 mb)
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index102°F (39°C)
Last update 29 Jun 11:53 am CDT
Extended Forecast for

2 Miles WNW Caseyville IL

Extreme Heat Warning June 29, 12:39pm until July 3, 10:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning June 29, 12:39pm until July 3, 10:00pm

    NOW until 10:00pm Fri

    Extreme Heat Warning

  • This Afternoon

    High: 97 °F

    Hot

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming clear, with a low around 77. South wind 5 to 11 mph.

    Low: 77 °F

    Decreasing
    Clouds

  • Tuesday

    Tuesday: Sunny and hot, with a high near 98. Heat index values as high as 110. South wind 5 to 9 mph.

    High: 98 °F

    Hot

  • Tuesday Night

    Tuesday Night: Clear, with a low around 77. South wind 3 to 8 mph.

    Low: 77 °F

    Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 97. Light south wind increasing to 5 to 9 mph in the morning.

    High: 97 °F

    Hot

  • Wednesday Night

    Wednesday Night: Clear, with a low around 78.

    Low: 78 °F

    Clear

  • Thursday

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

    High: 98 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 79.

    Low: 79 °F

    Mostly Clear

Detailed Forecast

This Afternoon
Mostly sunny and hot, with a high near 97. Heat index values as high as 111. South wind 10 to 14 mph, with gusts as high as 21 mph.
Tonight
Mostly cloudy, then gradually becoming clear, with a low around 77. South wind 5 to 11 mph.
Tuesday
Sunny and hot, with a high near 98. Heat index values as high as 110. South wind 5 to 9 mph.
Tuesday Night
Clear, with a low around 77. South wind 3 to 8 mph.
Wednesday
Sunny and hot, with a high near 97. Light south wind increasing to 5 to 9 mph in the morning.
Wednesday Night
Clear, with a low around 78.
Thursday
Sunny and hot, with a high near 98.
Thursday Night
Mostly clear, with a low around 79.
Friday
A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 96.
Friday Night
Partly cloudy, with a low around 78.
Independence Day
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 95.
Saturday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 77.
Sunday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WNW Caseyville IL
 38.64°N 90.06°W (Elev. 420 ft)
Last Update:
12:01 pm CDT Jun 29, 2026
Forecast Valid:
12pm CDT Jun 29, 2026-6pm CDT Jul 5, 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