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.

Fair

48°F

9°C

Humidity 33%
Wind Speed SW 18 mph
Barometer 30.05 in (1018.3 mb)
Dewpoint 20°F (-7°C)
Visibility 10.00 mi
Wind Chill41°F (5°C)
Last update 21 Jan 12:51 pm CST
Extended Forecast for

Brentwood MO

  • This Afternoon

    This Afternoon: Sunny, with a high near 46. West wind 8 to 11 mph, with gusts as high as 23 mph.

    High: 46 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 24. West wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 23 mph.

    Low: 24 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 39. Light west wind.

    High: 39 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 9. Light northwest wind becoming north 9 to 14 mph after midnight. Winds could gust as high as 23 mph.

    Low: 9 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy and cold, with a steady temperature around 11. North wind 9 to 14 mph, with gusts as high as 23 mph.

    High: 11 °F

    Cold

  • Friday Night

    Friday Night: A 20 percent chance of snow after midnight. Cloudy, with a low around 2.

    Low: 2 °F

    Cloudy then
    Slight Chance
    Snow

  • Saturday

    Saturday: A 50 percent chance of snow. Cloudy and cold, with a high near 13.

    High: 13 °F

    Chance Snow

  • Saturday Night

    Saturday Night: A 50 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 8.

    Low: 8 °F

    Chance Snow
    then Slight
    Chance Snow

  • Sunday

    Sunday: A 20 percent chance of snow before noon. Partly sunny and cold, with a high near 20.

    High: 20 °F

    Slight Chance
    Snow then
    Partly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 46. West wind 8 to 11 mph, with gusts as high as 23 mph.
Tonight
Partly cloudy, with a low around 24. West wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 23 mph.
Thursday
Mostly sunny, with a high near 39. Light west wind.
Thursday Night
Mostly cloudy, with a low around 9. Light northwest wind becoming north 9 to 14 mph after midnight. Winds could gust as high as 23 mph.
Friday
Mostly cloudy and cold, with a steady temperature around 11. North wind 9 to 14 mph, with gusts as high as 23 mph.
Friday Night
A 20 percent chance of snow after midnight. Cloudy, with a low around 2.
Saturday
A 50 percent chance of snow. Cloudy and cold, with a high near 13.
Saturday Night
A 50 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 8.
Sunday
A 20 percent chance of snow before noon. Partly sunny and cold, with a high near 20.
Sunday Night
Partly cloudy, with a low around 5.
Monday
Sunny, with a high near 24.
Monday Night
Mostly clear, with a low around 11.
Tuesday
Mostly 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:
10:57 am CST Jan 21, 2026
Forecast Valid:
1pm CST Jan 21, 2026-6pm CST Jan 27, 2026
 
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