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

90°F

32°C

Humidity 59%
Wind Speed SW 12 G 20 mph
Barometer 29.97 in (1014.5 mb)
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index99°F (37°C)
Last update 21 Jun 10:53 am CDT
Extended Forecast for

3 Miles SSW Millstadt IL

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

  • Today

    Today: Sunny, with a high near 96. Heat index values as high as 105. South wind 11 to 14 mph, with gusts as high as 22 mph.

    High: 96 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 75. South wind 7 to 11 mph.

    Low: 75 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 96. Heat index values as high as 105. Southwest wind 7 to 11 mph.

    High: 96 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 76. South wind 6 to 9 mph.

    Low: 76 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 95. South wind 6 to 8 mph.

    High: 95 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 76.

    Low: 76 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 94.

    High: 94 °F

    Slight Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 75.

    Low: 75 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 94.

    High: 94 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 96. Heat index values as high as 105. South wind 11 to 14 mph, with gusts as high as 22 mph.
Tonight
Clear, with a low around 75. South wind 7 to 11 mph.
Sunday
Sunny, with a high near 96. Heat index values as high as 105. Southwest wind 7 to 11 mph.
Sunday Night
Mostly clear, with a low around 76. South wind 6 to 9 mph.
Monday
Sunny, with a high near 95. South wind 6 to 8 mph.
Monday Night
Mostly clear, with a low around 76.
Tuesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 94.
Tuesday Night
Partly cloudy, with a low around 75.
Wednesday
Sunny, with a high near 94.
Wednesday Night
Mostly clear, with a low around 76.
Thursday
Sunny, with a high near 94.
Thursday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 74.
Friday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSW Millstadt IL
 38.42°N 90.13°W (Elev. 627 ft)
Last Update:
9:37 am CDT Jun 21, 2025
Forecast Valid:
11am CDT Jun 21, 2025-6pm CDT Jun 27, 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