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.

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.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

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