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.

Fog/Mist

43°F

6°C

Humidity 100%
Wind Speed Calm
Barometer 30.24 in (1024.0 mb)
Dewpoint 43°F (6°C)
Visibility 5.00 mi
Last update 23 Dec 10:51 pm CST
Extended Forecast for

Brentwood MO

  • Tonight

    Tonight: Patchy dense fog. Otherwise, mostly cloudy, with a low around 47. Northeast wind 3 to 5 mph.

    Low: 47 °F

    Patchy Dense
    Fog

  • Wednesday

    Wednesday: A slight chance of drizzle between 8am and noon. Patchy dense fog before 9am. Otherwise, mostly cloudy, with a high near 65. South wind 5 to 7 mph.

    High: 65 °F

    Slight Chance
    Drizzle and
    Patchy Dense
    Fog

  • Wednesday Night

    Wednesday Night: Patchy dense fog after 3am. Otherwise, mostly cloudy, with a low around 53. South wind around 6 mph becoming calm after midnight.

    Low: 53 °F

    Mostly Cloudy
    then Patchy
    Dense Fog

  • Christmas Day

    Christmas Day: Patchy dense fog before 11am. Otherwise, mostly cloudy, with a high near 66. Calm wind becoming east around 5 mph in the afternoon.

    High: 66 °F

    Patchy Dense
    Fog then
    Mostly Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 57. Southeast wind around 6 mph becoming southwest after midnight.

    Low: 57 °F

    Mostly Cloudy

  • Friday

    Friday: Sunny, with a high near 73.

    High: 73 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 52.

    Low: 52 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 75.

    High: 75 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 39.

    Low: 39 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Patchy dense fog. Otherwise, mostly cloudy, with a low around 47. Northeast wind 3 to 5 mph.
Wednesday
A slight chance of drizzle between 8am and noon. Patchy dense fog before 9am. Otherwise, mostly cloudy, with a high near 65. South wind 5 to 7 mph.
Wednesday Night
Patchy dense fog after 3am. Otherwise, mostly cloudy, with a low around 53. South wind around 6 mph becoming calm after midnight.
Christmas Day
Patchy dense fog before 11am. Otherwise, mostly cloudy, with a high near 66. Calm wind becoming east around 5 mph in the afternoon.
Thursday Night
Mostly cloudy, with a low around 57. Southeast wind around 6 mph becoming southwest after midnight.
Friday
Sunny, with a high near 73.
Friday Night
Partly cloudy, with a low around 52.
Saturday
Partly sunny, with a high near 75.
Saturday Night
Mostly cloudy, with a low around 39.
Sunday
A 20 percent chance of rain. Mostly cloudy, with a high near 47.
Sunday Night
Mostly clear, with a low around 19.
Monday
Sunny, with a high near 29.
Monday Night
Mostly clear, with a low around 19.
Tuesday
Partly sunny, with a high near 37.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Brentwood MO
 38.62°N 90.35°W (Elev. 499 ft)
Last Update:
9:56 pm CST Dec 23, 2025
Forecast Valid:
11pm CST Dec 23, 2025-6pm CST Dec 30, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation