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 79%
Wind Speed S 8 mph
Barometer 29.94 in (1013.3 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 21 Jun 12:53 am CDT
Extended Forecast for

3 Miles W Millstadt IL

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

  • Overnight

    Overnight: Clear, with a low around 76. South wind around 10 mph.

    Low: 76 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 96. Heat index values as high as 107. Southwest wind 10 to 15 mph, with gusts as high as 23 mph.

    High: 96 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 74. South wind 8 to 11 mph, with gusts as high as 21 mph.

    Low: 74 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 97. Heat index values as high as 105. Southwest wind 8 to 10 mph.

    High: 97 °F

    Hot

  • 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 and hot, with a high near 97.

    High: 97 °F

    Hot

  • Monday Night

    Monday Night: Partly cloudy, with a low around 76.

    Low: 76 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of showers before 1pm. Mostly sunny, with a high near 93.

    High: 93 °F

    Slight Chance
    Showers

  • Tuesday Night

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

    Low: 75 °F

    Partly Cloudy

Detailed Forecast

Overnight
Clear, with a low around 76. South wind around 10 mph.
Saturday
Sunny, with a high near 96. Heat index values as high as 107. Southwest wind 10 to 15 mph, with gusts as high as 23 mph.
Saturday Night
Mostly clear, with a low around 74. South wind 8 to 11 mph, with gusts as high as 21 mph.
Sunday
Sunny and hot, with a high near 97. Heat index values as high as 105. Southwest wind 8 to 10 mph.
Sunday Night
Mostly clear, with a low around 76. South wind 6 to 9 mph.
Monday
Sunny and hot, with a high near 97.
Monday Night
Partly cloudy, with a low around 76.
Tuesday
A 20 percent chance of showers before 1pm. Mostly sunny, with a high near 93.
Tuesday Night
Partly cloudy, with a low around 75.
Wednesday
Mostly sunny, with a high near 94.
Wednesday Night
Partly cloudy, with a low around 75.
Thursday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93.
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 90.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles W Millstadt IL
 38.46°N 90.15°W (Elev. 630 ft)
Last Update:
12:21 am CDT Jun 21, 2025
Forecast Valid:
1am 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