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.

Partly Cloudy

93°F

34°C

Humidity 47%
Wind Speed S 13 mph
Barometer 30.08 in (1017.0 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index99°F (37°C)
Last update 23 Jun 6:51 pm CDT
Extended Forecast for

Saint Louis MO

Heat Advisory June 23, 09:00pm until June 26, 09:00pm
Extreme Heat Warning June 23, 07:42pm until June 23, 09:00pm
Click here for hazard details and duration
Heat Advisory
...
  •  
    Extreme Heat Warning June 23, 07:42pm until June 23, 09:00pm

    NOW until 9:00pm Mon

    Extreme Heat Warning

  • Tonight

    Low: 78 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 96. Heat index values as high as 102. Southwest wind 3 to 7 mph.

    High: 96 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 78. South wind around 6 mph becoming calm in the evening.

    Low: 78 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 95. Heat index values as high as 102. Calm wind becoming southwest around 6 mph in the afternoon. Chance of precipitation is 20%.

    High: 95 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 77. South wind around 5 mph becoming calm in the evening.

    Low: 77 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny and hot, with a high near 97.

    High: 97 °F

    Hot

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 77.

    Low: 77 °F

    Partly Cloudy

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 96.

    High: 96 °F

    Sunny then
    Slight Chance
    T-storms

Detailed Forecast

Tonight
Mostly clear, with a low around 78. South wind 3 to 7 mph.
Tuesday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 96. Heat index values as high as 102. Southwest wind 3 to 7 mph.
Tuesday Night
Mostly cloudy, with a low around 78. South wind around 6 mph becoming calm in the evening.
Wednesday
A slight chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 95. Heat index values as high as 102. Calm wind becoming southwest around 6 mph in the afternoon. Chance of precipitation is 20%.
Wednesday Night
Partly cloudy, with a low around 77. South wind around 5 mph becoming calm in the evening.
Thursday
Sunny and hot, with a high near 97.
Thursday Night
Partly cloudy, with a low around 77.
Friday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 96.
Friday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 76.
Saturday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 94.
Saturday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 76.
Sunday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 95.
Sunday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 75.
Monday
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Louis MO
 38.64°N 90.23°W (Elev. 538 ft)
Last Update:
5:37 pm CDT Jun 23, 2025
Forecast Valid:
7pm CDT Jun 23, 2025-6pm CDT Jun 30, 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