National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

St. Louis Lambert International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

Mostly Cloudy

71°F

22°C

Humidity 73%
Wind Speed Calm
Barometer 29.95 in (1013.3 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 21 Sep 9:51 pm CDT
Extended Forecast for

Clayton MO

  • Tonight

    Tonight: Showers likely, mainly after midnight. Cloudy, with a low around 66. Southwest wind around 6 mph becoming light and variable. Chance of precipitation is 70%.

    Low: 66 °F

    Showers
    Likely

  • Monday

    Monday: A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 78. Southeast wind around 7 mph. Chance of precipitation is 40%.

    High: 78 °F

    Chance
    Showers then
    Chance
    T-storms

  • Monday Night

    Monday Night: A chance of showers and thunderstorms between 1am and 4am, then a slight chance of showers. Partly cloudy, with a low around 67. South wind around 5 mph becoming calm in the evening. Chance of precipitation is 40%.

    Low: 67 °F

    Chance
    T-storms then
    Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 78. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 60%.

    High: 78 °F

    Chance
    Showers then
    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 65. Light and variable wind. Chance of precipitation is 70%.

    Low: 65 °F

    Showers
    Likely

  • Wednesday

    Wednesday: Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 77. Chance of precipitation is 70%.

    High: 77 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 62. Chance of precipitation is 50%.

    Low: 62 °F

    Chance
    Showers

  • Thursday

    Thursday: A 50 percent chance of showers. Partly sunny, with a high near 75.

    High: 75 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A 20 percent chance of showers. Partly cloudy, with a low around 61.

    Low: 61 °F

    Slight Chance
    Showers

Detailed Forecast

Tonight
Showers likely, mainly after midnight. Cloudy, with a low around 66. Southwest wind around 6 mph becoming light and variable. Chance of precipitation is 70%.
Monday
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 78. Southeast wind around 7 mph. Chance of precipitation is 40%.
Monday Night
A chance of showers and thunderstorms between 1am and 4am, then a slight chance of showers. Partly cloudy, with a low around 67. South wind around 5 mph becoming calm in the evening. Chance of precipitation is 40%.
Tuesday
A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 78. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 60%.
Tuesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 65. Light and variable wind. Chance of precipitation is 70%.
Wednesday
Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 77. Chance of precipitation is 70%.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 62. Chance of precipitation is 50%.
Thursday
A 50 percent chance of showers. Partly sunny, with a high near 75.
Thursday Night
A 20 percent chance of showers. Partly cloudy, with a low around 61.
Friday
A 20 percent chance of showers. Mostly sunny, with a high near 77.
Friday Night
Mostly clear, with a low around 60.
Saturday
Sunny, with a high near 80.
Saturday Night
Mostly clear, with a low around 60.
Sunday
Sunny, with a high near 82.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Clayton MO
 38.64°N 90.34°W (Elev. 522 ft)
Last Update:
10:06 pm CDT Sep 21, 2025
Forecast Valid:
10pm CDT Sep 21, 2025-6pm CDT Sep 28, 2025
 
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