National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

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.

Partly Cloudy

74°F

23°C

Humidity 71%
Wind Speed NW 7 mph
Barometer 30.06 in (1016.6 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 22 Aug 11:51 pm CDT
Extended Forecast for

Saint Louis MO

  • Overnight

    Overnight: Mostly clear, with a low around 66. Light north wind.

    Low: 66 °F

    Mostly Clear

  • Sunday

    Sunday: Increasing clouds, with a high near 83. Northwest wind 3 to 8 mph.

    High: 83 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: Cloudy, then gradual clearing toward daybreak, with a low around 64. North wind around 6 mph becoming calm in the evening.

    Low: 64 °F

    Clearing Late

  • Monday

    Monday: Mostly sunny, with a high near 83. Southeast wind 3 to 5 mph.

    High: 83 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 67. Southeast wind 3 to 6 mph.

    Low: 67 °F

    Slight Chance
    T-storms

  • Tuesday

    Tuesday: Mostly sunny, with a high near 86.

    High: 86 °F

    Mostly Sunny

  • Tuesday Night

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

    Low: 70 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 88.

    High: 88 °F

    Partly Sunny

  • Wednesday Night

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

    Low: 70 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 66. Light north wind.
Sunday
Increasing clouds, with a high near 83. Northwest wind 3 to 8 mph.
Sunday Night
Cloudy, then gradual clearing toward daybreak, with a low around 64. North wind around 6 mph becoming calm in the evening.
Monday
Mostly sunny, with a high near 83. Southeast wind 3 to 5 mph.
Monday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 67. Southeast wind 3 to 6 mph.
Tuesday
Mostly 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
Partly cloudy, with a low around 70.
Thursday
Sunny, with a high near 88.
Thursday Night
Mostly clear, with a low around 69.
Friday
Sunny, with a high near 86.
Friday Night
Partly cloudy, with a low around 70.
Saturday
Mostly sunny, with a high near 88.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Saint Louis MO
 38.64°N 90.26°W (Elev. 499 ft)
Last Update:
11:16 pm CDT Aug 22, 2026
Forecast Valid:
12am CDT Aug 23, 2026-6pm CDT Aug 29, 2026
 
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