Severe Weather and Heavy Rain from the Great Lakes to the Mid-Atlantic; Heat Persists in the East

Widespread strong thunderstorms with damaging winds and locally heavy rain are expected from the Upper Ohio Valley into the southern Mid-Atlantic today and portions of the central Appalachians and Carolinas on Saturday. Monsoonal moisture will bring a flash flooding threat to the Desert Southwest. Sweltering heat persists from the Plains to the southern Mid-Atlantic through tonight. Read More >

Current conditions at

St. Louis Lambert International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

Fair

82°F

28°C

Humidity 65%
Wind Speed SW 8 mph
Barometer 29.97 in (1013.2 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Heat Index85°F (29°C)
Last update 4 Sep 5:51 am CDT
Extended Forecast for

Maryland Heights MO

Extreme Heat Warning September 4, 06:48am until September 5, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning September 4, 06:48am until September 5, 08:00pm

    NOW until 8:00pm Sat

    Extreme Heat Warning

  • Today

    High: 101 °F

    Hot

  • Tonight

    Tonight: Mostly clear, with a low around 78. Calm wind.

    Low: 78 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny and hot, with a high near 101. Heat index values as high as 108. Calm wind becoming west around 5 mph in the afternoon.

    High: 101 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 75. Light and variable wind.

    Low: 75 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 95. Northeast wind 3 to 8 mph.

    High: 95 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 70.

    Low: 70 °F

    Mostly Clear

  • Labor Day

    Labor Day: Sunny, with a high near 94.

    High: 94 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 70.

    Low: 70 °F

    Mostly Clear

Detailed Forecast

Today
Sunny and hot, with a high near 101. Heat index values as high as 109. Southwest wind 3 to 6 mph.
Tonight
Mostly clear, with a low around 78. Calm wind.
Saturday
Mostly sunny and hot, with a high near 101. Heat index values as high as 108. Calm wind becoming west around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 75. Light and variable wind.
Sunday
Sunny, with a high near 95. Northeast wind 3 to 8 mph.
Sunday Night
Mostly clear, with a low around 70.
Labor Day
Sunny, with a high near 94.
Monday Night
Mostly clear, with a low around 70.
Tuesday
Sunny and hot, with a high near 99.
Tuesday Night
Mostly clear, with a low around 78.
Wednesday
Sunny and hot, with a high near 101.
Wednesday Night
A 20 percent chance of showers. Mostly clear, with a low around 78.
Thursday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 96.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
Maryland Heights MO
 38.72°N 90.48°W (Elev. 440 ft)
4:31 am CDT Sep 4, 2026
6am CDT Sep 4, 2026-6pm CDT Sep 10, 2026
 
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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