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

Hazardous Weather Conditions

Current conditions at

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

Lat: 38.66°NLon: 90.66°WElev: 463ft.

Fair

89°F

32°C

Humidity 63%
Wind Speed S 7 G 18 mph
Barometer 29.90 in (1011.5 mb)
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index99°F (37°C)
Last update 29 Jun 5:54 pm CDT
Extended Forecast for

Chesterfield MO

Extreme Heat Warning June 29, 06:51pm until July 3, 10:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning June 29, 06:51pm until July 3, 10:00pm

    NOW until 10:00pm Fri

    Extreme Heat Warning

  • Tonight

    Low: 76 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny and hot, with a high near 97. Heat index values as high as 106. Southwest wind 5 to 8 mph.

    High: 97 °F

    Hot

  • Tuesday Night

    Tuesday Night: Clear, with a low around 77. South wind around 6 mph.

    Low: 77 °F

    Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 97. Heat index values as high as 106. Southwest wind 3 to 6 mph.

    High: 97 °F

    Hot

  • Wednesday Night

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

    Low: 77 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 96.

    High: 96 °F

    Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 76.

    Low: 76 °F

    Slight Chance
    T-storms

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 95.

    High: 95 °F

    Sunny then
    Slight Chance
    T-storms

Detailed Forecast

Tonight
Partly cloudy, with a low around 76. South wind 6 to 9 mph.
Tuesday
Sunny and hot, with a high near 97. Heat index values as high as 106. Southwest wind 5 to 8 mph.
Tuesday Night
Clear, with a low around 77. South wind around 6 mph.
Wednesday
Sunny and hot, with a high near 97. Heat index values as high as 106. Southwest wind 3 to 6 mph.
Wednesday Night
Mostly clear, with a low around 77. South wind 3 to 6 mph.
Thursday
Sunny, with a high near 96.
Thursday Night
A 20 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 76.
Friday
A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 95.
Friday Night
Partly cloudy, with a low around 76.
Independence Day
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 95.
Saturday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 75.
Sunday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93.
Sunday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73.
Monday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Chesterfield MO
 38.65°N 90.57°W (Elev. 512 ft)
Last Update:
4:46 pm CDT Jun 29, 2026
Forecast Valid:
6pm CDT Jun 29, 2026-6pm CDT Jul 6, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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