Showers and Storms in the East; Dangerously Hot and Dry in the West

Scattered showers and storms are expected across portions of the Central and Eastern U.S. through the end of the week. Meanwhile, dangerous heat will intensify across the Desert Southwest and Intermountain West. Hot, dry weather and increasing winds will allow elevated wildfire conditions to return to the northern Intermountain West, where air quality issues persist from ongoing fires. Read More >

Current conditions at

St. Louis Lambert International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

A Few Clouds

76°F

24°C

Humidity 79%
Wind Speed SW 12 mph
Barometer 30.03 in (1015.4 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Heat Index77°F (25°C)
Last update 8 Aug 2:51 am CDT
Extended Forecast for

Saint Louis MO

Extreme Heat Watch August 9, 12:00pm until August 12, 08:00pm
Click here for hazard details and duration
Extreme Heat Watch
  • Overnight

    Overnight: Mostly clear, with a low around 73. Light west wind.

    Low: 73 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 91. Heat index values as high as 102. Light and variable wind.

    High: 91 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 73. Light south wind.

    Low: 73 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 94. Heat index values as high as 105. Light south wind increasing to 5 to 10 mph in the morning.

    High: 94 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 76. South wind 6 to 9 mph.

    Low: 76 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 96.

    High: 96 °F

    Sunny

  • Monday Night

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

    Low: 78 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 96.

    High: 96 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms, mainly after 1am.  Partly cloudy, with a low around 77.

    Low: 77 °F

    Chance
    T-storms

Detailed Forecast

Overnight
Mostly clear, with a low around 73. Light west wind.
Saturday
Sunny, with a high near 91. Heat index values as high as 102. Light and variable wind.
Saturday Night
Clear, with a low around 73. Light south wind.
Sunday
Sunny, with a high near 94. Heat index values as high as 105. Light south wind increasing to 5 to 10 mph in the morning.
Sunday Night
Mostly clear, with a low around 76. South wind 6 to 9 mph.
Monday
Sunny, with a high near 96.
Monday Night
Mostly clear, with a low around 78.
Tuesday
Sunny, with a high near 96.
Tuesday Night
A 30 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 77.
Wednesday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93.
Wednesday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 74.
Thursday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 87.
Thursday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 71. Chance of precipitation is 60%.
Friday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 84.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Louis MO
 38.62°N 90.23°W (Elev. 489 ft)
2:11 am CDT Aug 8, 2026
3am CDT Aug 8, 2026-6pm CDT Aug 14, 2026
 
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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