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.

Overcast

17°F

-8°C

Humidity 49%
Wind Speed SW 6 mph
Barometer 30.42 in (1031.9 mb)
Dewpoint 1°F (-17°C)
Visibility 10.00 mi
Wind Chill8°F (-13°C)
Last update 20 Jan 4:51 am CST
Extended Forecast for

Lambert-St. Louis International Airport MO

  • Today

    Today: Mostly sunny, with a high near 37. Light south wind increasing to 5 to 10 mph in the morning.

    High: 37 °F

    Mostly Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 29. South wind 10 to 13 mph, with gusts as high as 23 mph.

    Low: 29 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Mostly cloudy, then gradually becoming sunny, with a high near 45. West wind 7 to 11 mph, with gusts as high as 21 mph.

    High: 45 °F

    Decreasing
    Clouds

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 25. Southwest wind 6 to 9 mph becoming northwest after midnight.

    Low: 25 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 37. Northwest wind around 6 mph.

    High: 37 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 12.

    Low: 12 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy and cold, with a high near 17.

    High: 17 °F

    Cold

  • Friday Night

    Friday Night: A 30 percent chance of snow, mainly after midnight. Mostly cloudy, with a low around 4.

    Low: 4 °F

    Chance Snow

  • Saturday

    Saturday: A 40 percent chance of snow. Mostly cloudy and cold, with a high near 15.

    High: 15 °F

    Chance Snow

Detailed Forecast

Today
Mostly sunny, with a high near 37. Light south wind increasing to 5 to 10 mph in the morning.
Tonight
Increasing clouds, with a low around 29. South wind 10 to 13 mph, with gusts as high as 23 mph.
Wednesday
Mostly cloudy, then gradually becoming sunny, with a high near 45. West wind 7 to 11 mph, with gusts as high as 21 mph.
Wednesday Night
Partly cloudy, with a low around 25. Southwest wind 6 to 9 mph becoming northwest after midnight.
Thursday
Mostly sunny, with a high near 37. Northwest wind around 6 mph.
Thursday Night
Mostly cloudy, with a low around 12.
Friday
Mostly cloudy and cold, with a high near 17.
Friday Night
A 30 percent chance of snow, mainly after midnight. Mostly cloudy, with a low around 4.
Saturday
A 40 percent chance of snow. Mostly cloudy and cold, with a high near 15.
Saturday Night
A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 7.
Sunday
Mostly sunny, with a high near 25.
Sunday Night
Mostly clear, with a low around 8.
Monday
Sunny, with a high near 28.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lambert-St. Louis International Airport MO
 38.78°N 90.37°W (Elev. 587 ft)
Last Update:
4:36 am CST Jan 20, 2026
Forecast Valid:
5am CST Jan 20, 2026-6pm CST Jan 26, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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