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

Tropical Storm Edouard Along the Gulf Coast; Heat Expands Eastward

Tropical Storm Edouard off the central Gulf Coast will bring tropical storm conditions and heavy rainfall to portions of Upper Texas and southwestern Louisiana coasts Tuesday into Wednesday. Storm Surge Watches and Tropical Storm Warnings are in effect. Hot and humid conditions will continue to expand from the Central Plains into the Ohio Valley and Mid-Atlantic this week. Read More >

Hazardous Weather Conditions

Current conditions at

St. Louis, Spirit Of St. Louis Airport (KSUS)

Lat: 38.66°NLon: 90.66°WElev: 463ft.

Fair

85°F

29°C

Humidity 61%
Wind Speed S 8 mph
Barometer 29.97 in (1013.9 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index90°F (32°C)
Last update 31 Aug 8:54 pm CDT
Extended Forecast for

Chesterfield MO

Heat Advisory August 31, 09:51pm until September 4, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 31, 09:51pm until September 4, 08:00pm

    NOW until 8:00pm Fri

    Heat Advisory

  • Tonight

    Low: 74 °F

    Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 99. Heat index values as high as 103. Southwest wind 3 to 6 mph.

    High: 99 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 77. South wind 3 to 6 mph.

    Low: 77 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 99. Heat index values as high as 104. Southwest wind 5 to 7 mph.

    High: 99 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 79. South wind 3 to 6 mph.

    Low: 79 °F

    Mostly Clear

  • Thursday

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

    High: 99 °F

    Hot

  • Thursday Night

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

    Low: 79 °F

    Mostly Clear

  • Friday

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

    High: 99 °F

    Hot

Detailed Forecast

Tonight
Clear, with a low around 74. Southwest wind around 7 mph.
Tuesday
Sunny and hot, with a high near 99. Heat index values as high as 103. Southwest wind 3 to 6 mph.
Tuesday Night
Mostly clear, with a low around 77. South wind 3 to 6 mph.
Wednesday
Sunny and hot, with a high near 99. Heat index values as high as 104. Southwest wind 5 to 7 mph.
Wednesday Night
Mostly clear, with a low around 79. South wind 3 to 6 mph.
Thursday
Sunny and hot, with a high near 99.
Thursday Night
Mostly clear, with a low around 79.
Friday
Sunny and hot, with a high near 99.
Friday Night
Mostly clear, with a low around 78.
Saturday
Mostly sunny and hot, with a high near 97.
Saturday Night
Partly cloudy, with a low around 74.
Sunday
Mostly sunny, with a high near 93.
Sunday Night
Mostly clear, with a low around 70.
Labor Day
Mostly sunny, with a high near 92.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Chesterfield MO
 38.67°N 90.57°W (Elev. 446 ft)
Last Update:
9:06 pm CDT Aug 31, 2026
Forecast Valid:
9pm CDT Aug 31, 2026-6pm CDT Sep 7, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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