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

St. Louis Lambert International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

Mostly Cloudy

75°F

24°C

Humidity 36%
Wind Speed N 3 mph
Barometer 29.86 in (1010.7 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 20 Mar 7:51 pm CDT
Extended Forecast for

Lambert-St. Louis International Airport MO

  • Tonight

    Tonight: Partly cloudy, with a low around 53. North wind around 6 mph becoming light and variable after midnight.

    Low: 53 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 89. East wind 5 to 7 mph becoming southwest in the afternoon.

    High: 89 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 65. South wind 6 to 10 mph.

    Low: 65 °F

    Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 84. Southwest wind 10 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 22 mph.

    High: 84 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 40. North wind 14 to 18 mph, with gusts as high as 29 mph.

    Low: 40 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 57.

    High: 57 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 41.

    Low: 41 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 62.

    High: 62 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of rain and thunderstorms after 1am. Mostly cloudy, with a low around 43.

    Low: 43 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

Detailed Forecast

Tonight
Partly cloudy, with a low around 53. North wind around 6 mph becoming light and variable after midnight.
Saturday
Sunny, with a high near 89. East wind 5 to 7 mph becoming southwest in the afternoon.
Saturday Night
Clear, with a low around 65. South wind 6 to 10 mph.
Sunday
Mostly sunny, with a high near 84. Southwest wind 10 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 22 mph.
Sunday Night
Partly cloudy, with a low around 40. North wind 14 to 18 mph, with gusts as high as 29 mph.
Monday
Sunny, with a high near 57.
Monday Night
Partly cloudy, with a low around 41.
Tuesday
Partly sunny, with a high near 62.
Tuesday Night
A 20 percent chance of rain and thunderstorms after 1am. Mostly cloudy, with a low around 43.
Wednesday
Mostly cloudy, with a high near 67.
Wednesday Night
Partly cloudy, with a low around 52.
Thursday
A 20 percent chance of rain. Sunny, with a high near 77.
Thursday Night
A 40 percent chance of rain. Partly cloudy, with a low around 43.
Friday
A 20 percent chance of rain. Partly sunny, with a high near 54.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lambert-St. Louis International Airport MO
 38.76°N 90.37°W (Elev. 551 ft)
Last Update:
7:31 pm CDT Mar 20, 2026
Forecast Valid:
8pm CDT Mar 20, 2026-6pm CDT Mar 27, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation