Dangerous Heat over the South-Central and Southwest U.S. Through Next Week

Dangerous heat persists across the Desert Southwest through this weekend and across the Southern Plains and Lower Mississippi Valley through at least the middle of next week. Numerous daily record high temperatures are expected through at least Tuesday for much of Texas and Oklahoma as well as portions of Louisiana, New Mexico, and Arizona. Read More >

Current conditions at

St. Louis Lambert International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

A Few Clouds

78°F

26°C

Humidity 74%
Wind Speed SW 3 mph
Barometer 29.98 in (1014.1 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 21 Aug 10:51 pm CDT
Extended Forecast for

Saint Louis MO

  • Tonight

    Tonight: Mostly clear, with a low around 72. Light west wind.

    Low: 72 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 86. North wind 6 to 8 mph.

    High: 86 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 66. North wind around 6 mph becoming calm  in the evening.

    Low: 66 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 84. Calm wind becoming north around 6 mph in the afternoon.

    High: 84 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 64. North wind around 5 mph becoming calm  in the evening.

    Low: 64 °F

    Partly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 82.

    High: 82 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 67.

    Low: 67 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 86.

    High: 86 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 70.

    Low: 70 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 72. Light west wind.
Saturday
Sunny, with a high near 86. North wind 6 to 8 mph.
Saturday Night
Mostly clear, with a low around 66. North wind around 6 mph becoming calm in the evening.
Sunday
Sunny, with a high near 84. Calm wind becoming north around 6 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 64. North wind around 5 mph becoming calm in the evening.
Monday
Partly sunny, with a high near 82.
Monday Night
Mostly cloudy, with a low around 67.
Tuesday
Partly sunny, with a high near 86.
Tuesday Night
Partly cloudy, with a low around 70.
Wednesday
Partly sunny, with a high near 88.
Wednesday Night
Mostly clear, with a low around 69.
Thursday
Sunny, with a high near 89.
Thursday Night
Mostly clear, with a low around 70.
Friday
Mostly sunny, with a high near 88.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Louis MO
 38.64°N 90.26°W (Elev. 499 ft)
10:26 pm CDT Aug 21, 2026
11pm CDT Aug 21, 2026-6pm CDT Aug 28, 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