Severe Weather and Heavy Rain from the Ohio Valley to the Mid-Atlantic; Heat Persists in the South-Central U.S.

Widespread strong thunderstorms with damaging winds and locally heavy rain are expected across portions of the Ohio Valley into southern Mid-Atlantic and Carolinas. Rounds of strong thunderstorms are expected to develop across the northern and central Plains. Sweltering heat remains most persistent across the South-Central Plains and Lower/Middle Mississippi Valley through next week. Read More >

Current conditions at

St. Louis Lambert International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

Partly Cloudy

94°F

34°C

Humidity 48%
Wind Speed W 7 mph
Barometer 29.97 in (1013.1 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index102°F (39°C)
Last update 5 Sep 10:51 am CDT
Extended Forecast for

Greendale MO

Extreme Heat Warning September 5, 11:13am until September 5, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning September 5, 11:13am until September 5, 08:00pm

    NOW until 8:00pm Sat

    Extreme Heat Warning

  • Today

    High: 100 °F

    Hot

  • Tonight

    Tonight: Partly cloudy, with a low around 74. Northwest wind around 6 mph becoming light and variable.

    Low: 74 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 92. East wind 6 to 8 mph.

    High: 92 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 67. East wind 5 to 9 mph.

    Low: 67 °F

    Mostly Clear

  • Labor Day

    Labor Day: Sunny, with a high near 90. East wind around 6 mph.

    High: 90 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 69.

    Low: 69 °F

    Mostly Clear

  • Tuesday

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

    High: 97 °F

    Hot

  • Tuesday Night

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

    Low: 76 °F

    Mostly Clear

Detailed Forecast

Today
Mostly sunny and hot, with a high near 100. Heat index values as high as 108. Northwest wind 5 to 7 mph.
Tonight
Partly cloudy, with a low around 74. Northwest wind around 6 mph becoming light and variable.
Sunday
Mostly sunny, with a high near 92. East wind 6 to 8 mph.
Sunday Night
Mostly clear, with a low around 67. East wind 5 to 9 mph.
Labor Day
Sunny, with a high near 90. East wind around 6 mph.
Monday Night
Mostly clear, with a low around 69.
Tuesday
Sunny and hot, with a high near 97.
Tuesday Night
Mostly clear, with a low around 76.
Wednesday
Sunny and hot, with a high near 100.
Wednesday Night
A 40 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 74.
Thursday
A 50 percent chance of showers. Mostly sunny, with a high near 91.
Thursday Night
Partly cloudy, with a low around 70.
Friday
A 20 percent chance of showers. Mostly sunny, with a high near 90.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
Greendale MO
 38.69°N 90.31°W (Elev. 594 ft)
9:26 am CDT Sep 5, 2026
11am CDT Sep 5, 2026-6pm CDT Sep 11, 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