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.

Mostly Cloudy

49°F

9°C

Humidity 39%
Wind Speed E 10 mph
Barometer 30.37 in (1029.0 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Wind Chill45°F (7°C)
Last update 23 Mar 6:51 pm CDT
Extended Forecast for

Brentwood MO

  • Tonight

    Tonight: Mostly cloudy, with a low around 38. East wind 3 to 8 mph. Winds could gust as high as 22 mph.

    Low: 38 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 63. Southeast wind 6 to 9 mph, with gusts as high as 20 mph.

    High: 63 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 45. Southeast wind 5 to 9 mph.

    Low: 45 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 78. Light south wind increasing to 5 to 9 mph in the morning.

    High: 78 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 63. South wind around 7 mph.

    Low: 63 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 91.

    High: 91 °F

    Sunny

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 44. Chance of precipitation is 80%.

    Low: 44 °F

    Chance
    T-storms then
    Showers

  • Friday

    Friday: A chance of showers before 1pm, then a slight chance of rain after 1pm. Mostly cloudy, with a high near 53. Chance of precipitation is 40%.

    High: 53 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Partly cloudy, with a low around 34.

    Low: 34 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 38. East wind 3 to 8 mph. Winds could gust as high as 22 mph.
Tuesday
Mostly sunny, with a high near 63. Southeast wind 6 to 9 mph, with gusts as high as 20 mph.
Tuesday Night
Mostly cloudy, with a low around 45. Southeast wind 5 to 9 mph.
Wednesday
Mostly sunny, with a high near 78. Light south wind increasing to 5 to 9 mph in the morning.
Wednesday Night
Mostly clear, with a low around 63. South wind around 7 mph.
Thursday
Sunny, with a high near 91.
Thursday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 44. Chance of precipitation is 80%.
Friday
A chance of showers before 1pm, then a slight chance of rain after 1pm. Mostly cloudy, with a high near 53. Chance of precipitation is 40%.
Friday Night
Partly cloudy, with a low around 34.
Saturday
Sunny, with a high near 58.
Saturday Night
Partly cloudy, with a low around 39.
Sunday
Partly sunny, with a high near 65.
Sunday Night
Mostly cloudy, with a low around 48.
Monday
A 20 percent chance of rain. Mostly sunny, with a high near 73.
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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:
5:21 pm CDT Mar 23, 2026
Forecast Valid:
7pm CDT Mar 23, 2026-6pm CDT Mar 30, 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