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

St. Louis Lambert International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

Partly Cloudy

84°F

29°C

Humidity 38%
Wind Speed N 8 mph
Barometer 30.06 in (1017.0 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 29 Aug 5:51 pm CDT
Extended Forecast for

Brentwood MO

  • Tonight

    Tonight: Mostly clear, with a low around 63. Light southeast wind.

    Low: 63 °F

    Mostly Clear

  • Saturday

    Saturday: Increasing clouds, with a high near 86. Calm wind becoming east around 6 mph in the morning.

    High: 86 °F

    Increasing
    Clouds

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 65. East wind 3 to 6 mph.

    Low: 65 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 83. Calm wind becoming east 5 to 7 mph in the morning.

    High: 83 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 62. East wind around 6 mph becoming calm after midnight.

    Low: 62 °F

    Mostly Cloudy

  • Labor Day

    Labor Day: Partly sunny, with a high near 79.

    High: 79 °F

    Partly Sunny

  • Monday Night

    Monday Night: A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 62.

    Low: 62 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 79. Chance of precipitation is 30%.

    High: 79 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 62.

    Low: 62 °F

    Slight Chance
    T-storms

Detailed Forecast

Tonight
Mostly clear, with a low around 63. Light southeast wind.
Saturday
Increasing clouds, with a high near 86. Calm wind becoming east around 6 mph in the morning.
Saturday Night
Mostly cloudy, with a low around 65. East wind 3 to 6 mph.
Sunday
Partly sunny, with a high near 83. Calm wind becoming east 5 to 7 mph in the morning.
Sunday Night
Mostly cloudy, with a low around 62. East wind around 6 mph becoming calm after midnight.
Labor Day
Partly sunny, with a high near 79.
Monday Night
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 62.
Tuesday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 79. Chance of precipitation is 30%.
Tuesday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 62.
Wednesday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 81.
Wednesday Night
A 20 percent chance of showers. Partly cloudy, with a low around 55.
Thursday
Mostly sunny, with a high near 72.
Thursday Night
Mostly clear, with a low around 51.
Friday
Sunny, with a high near 78.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Brentwood MO
 38.62°N 90.35°W (Elev. 499 ft)
Last Update:
4:16 pm CDT Aug 29, 2025
Forecast Valid:
6pm CDT Aug 29, 2025-6pm CDT Sep 5, 2025
 
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