National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

St. Louis Lambert International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

Mostly Cloudy

89°F

32°C

Humidity 48%
Wind Speed W 3 mph
Barometer 29.98 in (1014.0 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Heat Index92°F (33°C)
Last update 14 Aug 2:51 pm CDT
Extended Forecast for

Earth City MO

Heat Advisory August 15, 12:00pm until August 18, 08:00pm
Click here for hazard details and duration
Heat Advisory

  • Tonight

    Tonight: Mostly clear, with a low around 71. East wind 3 to 5 mph.

    Low: 71 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 95. Heat index values as high as 101. Southeast wind 3 to 6 mph.

    High: 95 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 76. Southeast wind around 5 mph becoming calm after midnight.

    Low: 76 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 96. Heat index values as high as 105. Calm wind becoming south around 5 mph in the afternoon.

    High: 96 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 77. Southeast wind around 5 mph becoming calm after midnight.

    Low: 77 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 97.

    High: 97 °F

    Hot

  • Sunday Night

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

    Low: 78 °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 77.

    Low: 77 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 71. East wind 3 to 5 mph.
Friday
Sunny, with a high near 95. Heat index values as high as 101. Southeast wind 3 to 6 mph.
Friday Night
Mostly clear, with a low around 76. Southeast wind around 5 mph becoming calm after midnight.
Saturday
Sunny, with a high near 96. Heat index values as high as 105. Calm wind becoming south around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 77. Southeast wind around 5 mph becoming calm after midnight.
Sunday
Sunny and hot, with a high near 97.
Sunday Night
Mostly clear, with a low around 78.
Monday
Sunny and hot, with a high near 98.
Monday Night
Mostly clear, with a low around 77.
Tuesday
A slight chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 96. Chance of precipitation is 20%.
Tuesday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 74.
Wednesday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 88.
Wednesday Night
A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 70.
Thursday
A 20 percent chance of showers. Mostly sunny, with a high near 87.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Earth City MO
 38.78°N 90.48°W (Elev. 440 ft)
Last Update:
2:41 pm CDT Aug 14, 2025
Forecast Valid:
3pm CDT Aug 14, 2025-6pm CDT Aug 21, 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