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

40°F

4°C

Humidity 47%
Wind Speed S 7 mph
Barometer 29.89 in (1013.6 mb)
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Wind Chill35°F (2°C)
Last update 5 Dec 4:51 pm CST
Extended Forecast for

Lambert-St. Louis International Airport MO

  • Tonight

    Tonight: Mostly cloudy, with a low around 28. South wind 5 to 7 mph becoming west after midnight.

    Low: 28 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 37. Light and variable wind becoming southeast around 6 mph in the afternoon.

    High: 37 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A 30 percent chance of rain, mainly after 1am. Mostly cloudy, with a low around 31. Southeast wind 7 to 9 mph becoming south after midnight.

    Low: 31 °F

    Chance Rain

  • Sunday

    Sunday: A chance of rain before noon, then a slight chance of rain and snow between noon and 3pm, then a slight chance of snow after 3pm. Mostly cloudy, with a temperature falling to around 30 by 5pm. South wind 7 to 13 mph becoming north in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 30%.

    High: 38 °F⇓

    Chance Rain
    then Slight
    Chance
    Rain/Snow

  • Sunday Night

    Sunday Night: A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 17. North wind 7 to 13 mph.

    Low: 17 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 31.

    High: 31 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 24.

    Low: 24 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 46.

    High: 46 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 37.

    Low: 37 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 28. South wind 5 to 7 mph becoming west after midnight.
Saturday
Partly sunny, with a high near 37. Light and variable wind becoming southeast around 6 mph in the afternoon.
Saturday Night
A 30 percent chance of rain, mainly after 1am. Mostly cloudy, with a low around 31. Southeast wind 7 to 9 mph becoming south after midnight.
Sunday
A chance of rain before noon, then a slight chance of rain and snow between noon and 3pm, then a slight chance of snow after 3pm. Mostly cloudy, with a temperature falling to around 30 by 5pm. South wind 7 to 13 mph becoming north in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 30%.
Sunday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 17. North wind 7 to 13 mph.
Monday
Mostly sunny, with a high near 31.
Monday Night
Partly cloudy, with a low around 24.
Tuesday
Mostly sunny, with a high near 46.
Tuesday Night
Mostly cloudy, with a low around 37.
Wednesday
A 30 percent chance of rain, mainly after noon. Partly sunny, with a high near 45.
Wednesday Night
Mostly cloudy, with a low around 27.
Thursday
Mostly cloudy, with a high near 40.
Thursday Night
Mostly cloudy, with a low around 23.
Friday
Partly sunny, with a high near 32.
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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:
4:46 pm CST Dec 5, 2025
Forecast Valid:
5pm CST Dec 5, 2025-6pm CST Dec 12, 2025
 
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Additional Resources

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National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation