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

15°F

-9°C

Humidity 56%
Wind Speed SW 5 mph
Barometer 30.42 in (1031.9 mb)
Dewpoint 2°F (-17°C)
Visibility 10.00 mi
Wind Chill7°F (-14°C)
Last update 20 Jan 3:51 am CST
Extended Forecast for

Saint Louis MO

  • Today

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

    High: 37 °F

    Mostly Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 28. South wind 10 to 13 mph, with gusts as high as 22 mph.

    Low: 28 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Mostly cloudy, then gradually becoming sunny, with a high near 45. West wind 7 to 10 mph, with gusts as high as 20 mph.

    High: 45 °F

    Decreasing
    Clouds

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 25. West wind around 7 mph becoming northwest after midnight.

    Low: 25 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 38. Northwest wind 3 to 6 mph.

    High: 38 °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 19.

    High: 19 °F

    Cold

  • Friday Night

    Friday Night: A 30 percent chance of snow. 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 southwest wind becoming south 5 to 10 mph in the morning.
Tonight
Increasing clouds, with a low around 28. South wind 10 to 13 mph, with gusts as high as 22 mph.
Wednesday
Mostly cloudy, then gradually becoming sunny, with a high near 45. West wind 7 to 10 mph, with gusts as high as 20 mph.
Wednesday Night
Mostly clear, with a low around 25. West wind around 7 mph becoming northwest after midnight.
Thursday
Mostly sunny, with a high near 38. Northwest wind 3 to 6 mph.
Thursday Night
Mostly cloudy, with a low around 12.
Friday
Mostly cloudy and cold, with a high near 19.
Friday Night
A 30 percent chance of snow. 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, mainly before midnight. Mostly cloudy, with a low around 8.
Sunday
Mostly sunny, with a high near 25.
Sunday Night
Mostly clear, with a low around 8.
Monday
Sunny, with a high near 29.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Louis MO
 38.64°N 90.23°W (Elev. 538 ft)
Last Update:
3:15 am CST Jan 20, 2026
Forecast Valid:
4am CST Jan 20, 2026-6pm CST Jan 26, 2026
 
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