Showers and Storms in the East; Dangerously Hot and Dry in the West

Scattered showers and storms are expected across portions of the Central and Eastern U.S. through the end of the week. Meanwhile, dangerous heat will intensify across the Desert Southwest and Intermountain West. Hot, dry weather and increasing winds will allow elevated wildfire conditions to return to the northern Intermountain West, where air quality issues persist from ongoing fires. Read More >

Current conditions at

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

Lat: 38.66°NLon: 90.66°WElev: 463ft.

Fair

68°F

20°C

Humidity 93%
Wind Speed Calm
Barometer 30.04 in (1016.4 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 8 Aug 5:54 am CDT
Extended Forecast for

Chesterfield MO

Extreme Heat Watch August 9, 12:00pm until August 12, 08:00pm
Click here for hazard details and duration
Extreme Heat Watch
  • Today

    Today: Sunny, with a high near 91. Heat index values as high as 102. Calm wind.

    High: 91 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 72. Calm wind.

    Low: 72 °F

    Clear

  • Sunday

    Sunday: Increasing clouds, with a high near 95. Heat index values as high as 106. Light south wind increasing to 5 to 9 mph in the morning.

    High: 95 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 76. South wind 6 to 8 mph.

    Low: 76 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 96. Southwest wind 5 to 8 mph.

    High: 96 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 77.

    Low: 77 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 95.

    High: 95 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms after 1am.  Partly cloudy, with a low around 76.

    Low: 76 °F

    Partly Cloudy
    then Chance
    T-storms

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms.  Mostly sunny, with a high near 93.

    High: 93 °F

    Slight Chance
    T-storms

Detailed Forecast

Today
Sunny, with a high near 91. Heat index values as high as 102. Calm wind.
Tonight
Clear, with a low around 72. Calm wind.
Sunday
Increasing clouds, with a high near 95. Heat index values as high as 106. Light south wind increasing to 5 to 9 mph in the morning.
Sunday Night
Mostly clear, with a low around 76. South wind 6 to 8 mph.
Monday
Sunny, with a high near 96. Southwest wind 5 to 8 mph.
Monday Night
Mostly clear, with a low around 77.
Tuesday
Sunny, with a high near 95.
Tuesday Night
A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 76.
Wednesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93.
Wednesday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73.
Thursday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 87.
Thursday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 70. Chance of precipitation is 60%.
Friday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 85.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Chesterfield MO
 38.67°N 90.6°W (Elev. 449 ft)
6:36 am CDT Aug 8, 2026
6am CDT Aug 8, 2026-6pm CDT Aug 14, 2026
 
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