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.

Overcast

74°F

23°C

Humidity 97%
Wind Speed Calm
Barometer 29.91 in (1011.7 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Last update 27 Jun 4:51 am CDT
Extended Forecast for

Saint Louis MO

Extreme Heat Watch June 28, 12:00pm until July 3, 12:00am
Click here for hazard details and duration
Extreme Heat Watch

  • Overnight

    Overnight: A 20 percent chance of showers. Mostly cloudy, with a low around 72. Calm wind.

    Low: 72 °F

    Slight Chance
    Showers

  • Saturday

    Saturday: A chance of showers, with thunderstorms also possible after 7am. Partly sunny, with a high near 86. Light southwest wind. Chance of precipitation is 30%.

    High: 86 °F

    Chance
    Showers then
    Slight Chance
    T-storms

  • Saturday Night

    Saturday Night: A 40 percent chance of showers and thunderstorms, mainly between 9pm and 5am. Increasing clouds, with a low around 73. Light south wind.

    Low: 73 °F

    Chance
    T-storms

  • Sunday

    Sunday: Partly sunny, then gradually becoming sunny, with a high near 94. Heat index values as high as 110. South wind 5 to 9 mph.

    High: 94 °F

    Becoming
    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 76. South wind 5 to 9 mph.

    Low: 76 °F

    Mostly Clear

  • Monday

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

    High: 97 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 77.

    Low: 77 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 98.

    High: 98 °F

    Hot

  • Tuesday Night

    Tuesday Night: Clear, with a low around 78.

    Low: 78 °F

    Clear

Detailed Forecast

Overnight
A 20 percent chance of showers. Mostly cloudy, with a low around 72. Calm wind.
Saturday
A chance of showers, with thunderstorms also possible after 7am. Partly sunny, with a high near 86. Light southwest wind. Chance of precipitation is 30%.
Saturday Night
A 40 percent chance of showers and thunderstorms, mainly between 9pm and 5am. Increasing clouds, with a low around 73. Light south wind.
Sunday
Partly sunny, then gradually becoming sunny, with a high near 94. Heat index values as high as 110. South wind 5 to 9 mph.
Sunday Night
Mostly clear, with a low around 76. South wind 5 to 9 mph.
Monday
Sunny and hot, with a high near 97.
Monday Night
Mostly clear, with a low around 77.
Tuesday
Sunny and hot, with a high near 98.
Tuesday Night
Clear, with a low around 78.
Wednesday
Sunny and hot, with a high near 97.
Wednesday Night
Mostly clear, with a low around 79.
Thursday
Sunny, with a high near 96.
Thursday Night
Mostly clear, with a low around 78.
Friday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 95.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Saint Louis MO
 38.64°N 90.23°W (Elev. 538 ft)
Last Update:
2:26 am CDT Jun 27, 2026
Forecast Valid:
5am CDT Jun 27, 2026-6pm CDT Jul 3, 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