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

Dangerous Heat over the South-Central and Southwest U.S. Through Next Week

Dangerous heat persists across the Desert Southwest through this weekend and across the Southern Plains and Lower Mississippi Valley through at least the middle of next week. Numerous daily record high temperatures are expected through at least Tuesday for much of Texas and Oklahoma as well as portions of Louisiana, New Mexico, and Arizona. Read More >

Current conditions at

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

Lat: 38.66°NLon: 90.66°WElev: 463ft.

Fair

63°F

17°C

Humidity 97%
Wind Speed W 5 mph
Barometer 30.07 in (1017.6 mb)
Dewpoint 62°F (17°C)
Visibility 8.00 mi
Last update 23 Aug 3:54 am CDT
Extended Forecast for

Chesterfield MO

  • Today

    Today: Patchy fog before 7am. Otherwise, mostly sunny, with a high near 82. Calm wind becoming northwest 5 to 7 mph in the morning.

    High: 82 °F

    Patchy Fog
    then Mostly
    Sunny

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 62. North wind around 5 mph becoming calm in the evening.

    Low: 62 °F

    Decreasing
    Clouds

  • Monday

    Monday: Increasing clouds, with a high near 82. Light east wind.

    High: 82 °F

    Increasing
    Clouds

  • Monday Night

    Monday Night: Partly cloudy, with a low around 65. Light southeast wind.

    Low: 65 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 85. Southeast wind 3 to 5 mph.

    High: 85 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 68.

    Low: 68 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 89.

    High: 89 °F

    Mostly Sunny

  • Wednesday Night

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

    Low: 69 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 87.

    High: 87 °F

    Sunny

Detailed Forecast

Today
Patchy fog before 7am. Otherwise, mostly sunny, with a high near 82. Calm wind becoming northwest 5 to 7 mph in the morning.
Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 62. North wind around 5 mph becoming calm in the evening.
Monday
Increasing clouds, with a high near 82. Light east wind.
Monday Night
Partly cloudy, with a low around 65. Light southeast wind.
Tuesday
Mostly sunny, with a high near 85. Southeast wind 3 to 5 mph.
Tuesday Night
Partly cloudy, with a low around 68.
Wednesday
Mostly sunny, with a high near 89.
Wednesday Night
Mostly clear, with a low around 69.
Thursday
Sunny, with a high near 87.
Thursday Night
Mostly clear, with a low around 67.
Friday
Sunny, with a high near 85.
Friday Night
Partly cloudy, with a low around 67.
Saturday
A 20 percent chance of showers. Mostly sunny, with a high near 86.
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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:
1:26 am CDT Aug 23, 2026
Forecast Valid:
4am CDT Aug 23, 2026-6pm CDT Aug 29, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation