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

32°F

0°C

Humidity 64%
Wind Speed Calm
Barometer 30.26 in (1025.9 mb)
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Last update 8 Dec 2:51 pm CST
Extended Forecast for

Clayton MO

  • Tonight

    Tonight: Increasing clouds, with a temperature rising to around 33 by 4am. Light and variable wind becoming south 5 to 9 mph in the evening.

    Low: 28 °F⇑

    Increasing
    Clouds

  • Tuesday

    Tuesday: Mostly sunny, with a high near 55. Southwest wind 9 to 13 mph, with gusts as high as 22 mph.

    High: 55 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a steady temperature around 47. South wind 14 to 17 mph becoming west after midnight. Winds could gust as high as 30 mph.

    Low: 47 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a temperature falling to around 37 by 5pm. Breezy, with a northwest wind 13 to 22 mph, with gusts as high as 37 mph.

    High: 47 °F⇓

    Partly Sunny
    and Breezy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 27. Northwest wind 5 to 9 mph becoming light after midnight.

    Low: 27 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 20 percent chance of snow before noon. Mostly cloudy, with a high near 38.

    High: 38 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 27.

    Low: 27 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 35.

    High: 35 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 15.

    Low: 15 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Increasing clouds, with a temperature rising to around 33 by 4am. Light and variable wind becoming south 5 to 9 mph in the evening.
Tuesday
Mostly sunny, with a high near 55. Southwest wind 9 to 13 mph, with gusts as high as 22 mph.
Tuesday Night
Mostly cloudy, with a steady temperature around 47. South wind 14 to 17 mph becoming west after midnight. Winds could gust as high as 30 mph.
Wednesday
Partly sunny, with a temperature falling to around 37 by 5pm. Breezy, with a northwest wind 13 to 22 mph, with gusts as high as 37 mph.
Wednesday Night
Mostly cloudy, with a low around 27. Northwest wind 5 to 9 mph becoming light after midnight.
Thursday
A 20 percent chance of snow before noon. Mostly cloudy, with a high near 38.
Thursday Night
Mostly cloudy, with a low around 27.
Friday
Partly sunny, with a high near 35.
Friday Night
Mostly cloudy, with a low around 15.
Saturday
Partly sunny, with a high near 25.
Saturday Night
Mostly cloudy, with a low around 15.
Sunday
Mostly sunny, with a high near 29.
Sunday Night
Mostly cloudy, with a low around 21.
Monday
A 20 percent chance of rain. Mostly cloudy, with a high near 38.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Clayton MO
 38.64°N 90.32°W (Elev. 558 ft)
Last Update:
3:16 pm CST Dec 8, 2025
Forecast Valid:
3pm CST Dec 8, 2025-6pm CST Dec 15, 2025
 
Forecast Discussion
 
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Additional Resources

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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