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.

Overcast

32°F

0°C

Humidity 66%
Wind Speed NE 8 mph
Barometer 29.98 in (1016.3 mb)
Dewpoint 22°F (-6°C)
Visibility 10.00 mi
Wind Chill25°F (-4°C)
Last update 2 Jan 7:51 pm CST
Extended Forecast for

Clayton MO

  • Tonight

    Tonight: Mostly cloudy, with a low around 28. Northeast wind 5 to 7 mph.

    Low: 28 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy through mid morning, then gradual clearing, with a high near 40. Northwest wind 5 to 7 mph.

    High: 40 °F

    Becoming
    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 26. Northwest wind around 6 mph becoming calm after midnight.

    Low: 26 °F

    Mostly Clear

  • Sunday

    Sunday: Increasing clouds, with a high near 40. Calm wind becoming southeast around 6 mph in the afternoon.

    High: 40 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 31. South wind around 6 mph.

    Low: 31 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 58.

    High: 58 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 44.

    Low: 44 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 61.

    High: 61 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 40.

    Low: 40 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 28. Northeast wind 5 to 7 mph.
Saturday
Mostly cloudy through mid morning, then gradual clearing, with a high near 40. Northwest wind 5 to 7 mph.
Saturday Night
Mostly clear, with a low around 26. Northwest wind around 6 mph becoming calm after midnight.
Sunday
Increasing clouds, with a high near 40. Calm wind becoming southeast around 6 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 31. South wind around 6 mph.
Monday
Sunny, with a high near 58.
Monday Night
Partly cloudy, with a low around 44.
Tuesday
Mostly sunny, with a high near 61.
Tuesday Night
Mostly cloudy, with a low around 40.
Wednesday
Partly sunny, with a high near 61.
Wednesday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 48.
Thursday
A 50 percent chance of rain. Partly sunny, with a high near 62.
Thursday Night
A 40 percent chance of rain. Partly cloudy, with a low around 47.
Friday
A 20 percent chance of rain. Partly sunny, with a high near 59.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Clayton MO
 38.64°N 90.32°W (Elev. 558 ft)
Last Update:
7:36 pm CST Jan 2, 2026
Forecast Valid:
8pm CST Jan 2, 2026-6pm CST Jan 9, 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