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

82°F

28°C

Humidity 88%
Wind Speed SW 5 mph
Barometer 29.95 in (1012.6 mb)
Dewpoint 78°F (26°C)
Visibility 10.00 mi
Heat Index91°F (33°C)
Last update 26 Jul 7:51 am CDT
Extended Forecast for

Saint Louis MO

Extreme Heat Warning July 26, 11:00am until July 27, 09:00pm
Click here for hazard details and duration
Extreme Heat Warning

  • Today

    Today: Isolated showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 97. Heat index values as high as 113. Light and variable wind. Chance of precipitation is 20%.

    High: 97 °F

    Mostly Sunny
    then Isolated
    T-storms

  • Tonight

    Tonight: Isolated showers and thunderstorms before 9pm. Partly cloudy, with a low around 79. Light and variable wind. Chance of precipitation is 20%.

    Low: 79 °F

    Isolated
    T-storms then
    Partly Cloudy

  • Monday

    Monday: Sunny and hot, with a high near 99. Heat index values as high as 110. Southwest wind 5 to 9 mph.

    High: 99 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 80. Southwest wind 6 to 8 mph.

    Low: 80 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 93. Northwest wind 6 to 8 mph.

    High: 93 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 73.

    Low: 73 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 89.

    High: 89 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 69.

    Low: 69 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 90.

    High: 90 °F

    Sunny

Detailed Forecast

Today
Isolated showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 97. Heat index values as high as 113. Light and variable wind. Chance of precipitation is 20%.
Tonight
Isolated showers and thunderstorms before 9pm. Partly cloudy, with a low around 79. Light and variable wind. Chance of precipitation is 20%.
Monday
Sunny and hot, with a high near 99. Heat index values as high as 110. Southwest wind 5 to 9 mph.
Monday Night
Mostly clear, with a low around 80. Southwest wind 6 to 8 mph.
Tuesday
Mostly sunny, with a high near 93. Northwest wind 6 to 8 mph.
Tuesday Night
Partly cloudy, with a low around 73.
Wednesday
Sunny, with a high near 89.
Wednesday Night
Mostly clear, with a low around 69.
Thursday
Sunny, with a high near 90.
Thursday Night
A 20 percent chance of showers after 1am. Partly cloudy, with a low around 71.
Friday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 86.
Friday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 70.
Saturday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 86.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Saint Louis MO
 38.64°N 90.23°W (Elev. 538 ft)
Last Update:
7:56 am CDT Jul 26, 2026
Forecast Valid:
8am CDT Jul 26, 2026-6pm CDT Aug 1, 2026
 
Forecast Discussion
 
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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation