NWS St. Louis Announces Changes To May 16, 2025 Tornado Damage Assessment

After a year-long review of new ground survey data and aerial imagery, NWS St. Louis made several adjustments to the May 16, 2025 tornado damage assessment. Read More >

Hazardous Weather Conditions

Current conditions at

St. Louis Lambert International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

A Few Clouds

62°F

17°C

Humidity 62%
Wind Speed NE 9 mph
Barometer 30.15 in (1020.4 mb)
Dewpoint 49°F (9°C)
Visibility 10.00 mi
Last update 21 May 9:51 am CDT
Extended Forecast for

Clayton MO

  • Today

    Today: Increasing clouds, with a high near 71. East wind around 8 mph.

    High: 71 °F

    Increasing
    Clouds

  • Tonight

    Tonight: Cloudy, with a low around 57. East wind 6 to 8 mph.

    Low: 57 °F

    Cloudy

  • Friday

    Friday: Showers likely, with thunderstorms also possible after 1pm.  Cloudy, with a high near 71. East wind around 8 mph.  Chance of precipitation is 70%.

    High: 71 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A 40 percent chance of showers before 1am.  Mostly cloudy, with a low around 59. East wind around 6 mph becoming light and variable.

    Low: 59 °F

    Chance
    Showers

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms after 1pm.  Partly sunny, with a high near 82. West wind 3 to 6 mph.

    High: 82 °F

    Partly Sunny
    then Chance
    T-storms

  • Saturday Night

    Saturday Night: A 40 percent chance of showers and thunderstorms, mainly after 1am.  Mostly cloudy, with a low around 62.

    Low: 62 °F

    Chance
    T-storms then
    Chance
    Showers

  • Sunday

    Sunday: Showers likely and possibly a thunderstorm.  Mostly cloudy, with a high near 82. Chance of precipitation is 60%.

    High: 82 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 63.

    Low: 63 °F

    Mostly Cloudy

  • Memorial Day

    Memorial Day: A 20 percent chance of showers and thunderstorms.  Partly sunny, with a high near 83.

    High: 83 °F

    Slight Chance
    T-storms

Detailed Forecast

Today
Increasing clouds, with a high near 71. East wind around 8 mph.
Tonight
Cloudy, with a low around 57. East wind 6 to 8 mph.
Friday
Showers likely, with thunderstorms also possible after 1pm. Cloudy, with a high near 71. East wind around 8 mph. Chance of precipitation is 70%.
Friday Night
A 40 percent chance of showers before 1am. Mostly cloudy, with a low around 59. East wind around 6 mph becoming light and variable.
Saturday
A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 82. West wind 3 to 6 mph.
Saturday Night
A 40 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 62.
Sunday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 82. Chance of precipitation is 60%.
Sunday Night
Mostly cloudy, with a low around 63.
Memorial Day
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 83.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Chance of precipitation is 30%.
Tuesday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 85.
Tuesday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 67.
Wednesday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 88.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Clayton MO
 38.64°N 90.34°W (Elev. 522 ft)
8:21 am CDT May 21, 2026
10am CDT May 21, 2026-6pm CDT May 27, 2026
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database