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.

Fair

75°F

24°C

Humidity 69%
Wind Speed SW 6 mph
Barometer 30.02 in (1015.4 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 19 Jun 11:51 pm CDT
Extended Forecast for

2 Miles SSW West Alton MO

Extreme Heat Watch June 21, 12:00pm until June 24, 09:00pm
Click here for hazard details and duration
Extreme Heat Watch

  • Overnight

    Overnight: Mostly clear, with a low around 68. Light south wind.

    Low: 68 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 92. South wind 5 to 10 mph.

    High: 92 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 76. South wind 8 to 11 mph, with gusts as high as 20 mph.

    Low: 76 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 96. Heat index values as high as 103. Southwest wind 10 to 15 mph, with gusts as high as 23 mph.

    High: 96 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 77. South wind 7 to 11 mph.

    Low: 77 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 96.

    High: 96 °F

    Sunny

  • Sunday Night

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

    Low: 77 °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 76.

    Low: 76 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 68. Light south wind.
Friday
Sunny, with a high near 92. South wind 5 to 10 mph.
Friday Night
Mostly clear, with a low around 76. South wind 8 to 11 mph, with gusts as high as 20 mph.
Saturday
Sunny, with a high near 96. Heat index values as high as 103. Southwest wind 10 to 15 mph, with gusts as high as 23 mph.
Saturday Night
Mostly clear, with a low around 77. South wind 7 to 11 mph.
Sunday
Sunny, with a high near 96.
Sunday Night
Mostly clear, with a low around 77.
Monday
Sunny, with a high near 96.
Monday Night
Mostly clear, with a low around 76.
Tuesday
A 20 percent chance of showers and thunderstorms before 1pm. Sunny, with a high near 95.
Tuesday Night
Partly cloudy, with a low around 76.
Wednesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 94.
Wednesday Night
Partly cloudy, with a low around 75.
Thursday
A 30 percent chance of showers and thunderstorms. Sunny, with a high near 92.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSW West Alton MO
 38.84°N 90.25°W (Elev. 499 ft)
Last Update:
10:36 pm CDT Jun 19, 2025
Forecast Valid:
12am CDT Jun 20, 2025-6pm CDT Jun 26, 2025
 
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