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Tropical Storm Edouard to Impact the Northwest Gulf Coast; Heat Expands Eastward

Tropical Storm Edouard will bring tropical storm to hurricane conditions, heavy rainfall, flash and some river flooding, and storm surge to portions of Upper Texas and southwestern Louisiana coasts into Wednesday. Severe thunderstorms are possible in the Central Plains and Mid-Atlantic. Hot and humid conditions will expand from the Central Plains into the Ohio Valley and Mid-Atlantic. Read More >

Hazardous Weather Conditions

Current conditions at

St. Louis Lambert International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

A Few Clouds

84°F

29°C

Humidity 59%
Wind Speed SW 12 mph
Barometer 30.07 in (1016.5 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 1 Sep 8:51 am CDT
Extended Forecast for

2 Miles NNW Earth City MO

Heat Advisory September 1, 09:44am until September 4, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory September 1, 09:44am until September 4, 08:00pm

    NOW until 8:00pm Fri

    Heat Advisory

  • Today

    High: 99 °F

    Hot

  • Tonight

    Tonight: Mostly clear, with a low around 78. South wind 3 to 7 mph.

    Low: 78 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 99. Heat index values as high as 104. Southwest wind 6 to 8 mph.

    High: 99 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 80. South wind 5 to 7 mph.

    Low: 80 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 99. Southwest wind 5 to 7 mph.

    High: 99 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 81.

    Low: 81 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 99.

    High: 99 °F

    Hot

  • Friday Night

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

    Low: 79 °F

    Mostly Clear

Detailed Forecast

Today
Sunny and hot, with a high near 99. Heat index values as high as 103. Southwest wind 5 to 8 mph.
Tonight
Mostly clear, with a low around 78. South wind 3 to 7 mph.
Wednesday
Sunny and hot, with a high near 99. Heat index values as high as 104. Southwest wind 6 to 8 mph.
Wednesday Night
Mostly clear, with a low around 80. South wind 5 to 7 mph.
Thursday
Sunny and hot, with a high near 99. Southwest wind 5 to 7 mph.
Thursday Night
Mostly clear, with a low around 81.
Friday
Sunny and hot, with a high near 99.
Friday Night
Mostly clear, with a low around 79.
Saturday
Mostly sunny and hot, with a high near 99.
Saturday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 76.
Sunday
Mostly sunny, with a high near 96.
Sunday Night
Partly cloudy, with a low around 73.
Labor Day
Mostly sunny, with a high near 93.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNW Earth City MO
 38.8°N 90.48°W (Elev. 456 ft)
Last Update:
9:21 am CDT Sep 1, 2026
Forecast Valid:
9am CDT Sep 1, 2026-6pm CDT Sep 7, 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