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.

Partly Cloudy

71°F

22°C

Humidity 17%
Wind Speed Calm
Barometer 29.63 in (1002.8 mb)
Dewpoint 24°F (-4°C)
Visibility 10.00 mi
Last update 18 Feb 4:51 pm CST
Extended Forecast for

Lambert-St. Louis International Airport MO

  • Tonight

    Tonight: Partly cloudy, with a low around 50. Light and variable wind becoming south around 6 mph in the evening.

    Low: 50 °F

    Partly Cloudy

  • Thursday

    Thursday: A 30 percent chance of rain and thunderstorms, mainly before 1pm. Partly sunny, with a high near 71. South wind 6 to 11 mph becoming southwest 12 to 17 mph in the afternoon. Winds could gust as high as 28 mph.

    High: 71 °F

    Chance Rain
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 37. West wind 14 to 18 mph, with gusts as high as 28 mph.

    Low: 37 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 50. West wind 9 to 17 mph, with gusts as high as 28 mph.

    High: 50 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 31. North wind 6 to 8 mph.

    Low: 31 °F

    Partly Cloudy

  • Saturday

    Saturday: A slight chance of rain and snow. Mostly sunny, with a high near 45. Chance of precipitation is 20%.

    High: 45 °F

    Slight Chance
    Rain/Snow

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 25.

    Low: 25 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 39.

    High: 39 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 21.

    Low: 21 °F

    Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 50. Light and variable wind becoming south around 6 mph in the evening.
Thursday
A 30 percent chance of rain and thunderstorms, mainly before 1pm. Partly sunny, with a high near 71. South wind 6 to 11 mph becoming southwest 12 to 17 mph in the afternoon. Winds could gust as high as 28 mph.
Thursday Night
Mostly clear, with a low around 37. West wind 14 to 18 mph, with gusts as high as 28 mph.
Friday
Sunny, with a high near 50. West wind 9 to 17 mph, with gusts as high as 28 mph.
Friday Night
Partly cloudy, with a low around 31. North wind 6 to 8 mph.
Saturday
A slight chance of rain and snow. Mostly sunny, with a high near 45. Chance of precipitation is 20%.
Saturday Night
Mostly clear, with a low around 25.
Sunday
Sunny, with a high near 39.
Sunday Night
Clear, with a low around 21.
Monday
Sunny, with a high near 38.
Monday Night
Mostly clear, with a low around 23.
Tuesday
Mostly sunny, with a high near 50.
Tuesday Night
Mostly cloudy, with a low around 38.
Wednesday
A 20 percent chance of rain. Partly sunny, with a high near 56.
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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:
5:11 pm CST Feb 18, 2026
Forecast Valid:
5pm CST Feb 18, 2026-6pm CST Feb 25, 2026
 
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Additional Resources

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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