Current conditions at

St. Louis Lambert International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

Overcast

81°F

27°C

Humidity 85%
Wind Speed Vrbl 5 mph
Barometer 30.03 in (1015.4 mb)
Dewpoint 76°F (24°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 19 Jul 10:51 am CDT
Extended Forecast for

Saint Louis MO

Extreme Heat Warning July 19, 12:00pm until July 24, 07:00pm
Click here for hazard details and duration
Extreme Heat Warning
  • Today

    Today: A 40 percent chance of showers and thunderstorms, mainly before 5pm.  Partly sunny, with a high near 95. Heat index values as high as 106. Southwest wind around 7 mph.

    High: 95 °F

    Chance
    T-storms

  • Tonight

    Tonight: Partly cloudy, with a low around 78. Southwest wind around 6 mph.

    Low: 78 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny and hot, with a high near 98. Heat index values as high as 109. West wind around 6 mph.

    High: 98 °F

    Hot

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms.  Partly cloudy, with a low around 77. Northeast wind around 5 mph becoming light and variable  in the evening.

    Low: 77 °F

    Chance
    T-storms

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms.  Partly sunny, with a high near 94. South wind 3 to 6 mph.

    High: 94 °F

    Slight Chance
    T-storms

  • Monday Night

    Monday Night: Partly cloudy, with a low around 76.

    Low: 76 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 96.

    High: 96 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 78.

    Low: 78 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 99.

    High: 99 °F

    Hot

Detailed Forecast

Today
A 40 percent chance of showers and thunderstorms, mainly before 5pm. Partly sunny, with a high near 95. Heat index values as high as 106. Southwest wind around 7 mph.
Tonight
Partly cloudy, with a low around 78. Southwest wind around 6 mph.
Sunday
Mostly sunny and hot, with a high near 98. Heat index values as high as 109. West wind around 6 mph.
Sunday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 77. Northeast wind around 5 mph becoming light and variable in the evening.
Monday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 94. South wind 3 to 6 mph.
Monday Night
Partly cloudy, with a low around 76.
Tuesday
Mostly sunny, with a high near 96.
Tuesday Night
Mostly clear, with a low around 78.
Wednesday
Sunny and hot, with a high near 99.
Wednesday Night
Mostly clear, with a low around 79.
Thursday
Sunny and hot, with a high near 100.
Thursday Night
Mostly clear, with a low around 79.
Friday
Sunny and hot, with a high near 99.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Saint Louis MO
 38.62°N 90.23°W (Elev. 489 ft)
9:21 am CDT Jul 19, 2025
11am CDT Jul 19, 2025-6pm CDT Jul 25, 2025
 
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