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.

Fair

43°F

6°C

Humidity 63%
Wind Speed E 6 mph
Barometer 30.33 in (1026.9 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Wind Chill39°F (4°C)
Last update 20 Apr 6:51 am CDT
Extended Forecast for

Lambert-St. Louis International Airport MO

  • Today

    Today: Sunny, with a high near 70. East wind 6 to 8 mph becoming south in the afternoon.

    High: 70 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 54. Southeast wind around 10 mph.

    Low: 54 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 81. Southwest wind 9 to 16 mph, with gusts as high as 24 mph.

    High: 81 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 58. Southwest wind 10 to 14 mph.

    Low: 58 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 79. Southwest wind around 10 mph.

    High: 79 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 63. Chance of precipitation is 70%.

    Low: 63 °F

    Chance
    T-storms then
    Showers
    Likely

  • Friday

    Friday: Showers and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. High near 75. Chance of precipitation is 80%.

    High: 75 °F

    Showers

Detailed Forecast

Today
Sunny, with a high near 70. East wind 6 to 8 mph becoming south in the afternoon.
Tonight
Mostly clear, with a low around 54. Southeast wind around 10 mph.
Tuesday
Sunny, with a high near 81. Southwest wind 9 to 16 mph, with gusts as high as 24 mph.
Tuesday Night
Mostly clear, with a low around 58. Southwest wind 10 to 14 mph.
Wednesday
Sunny, with a high near 79. Southwest wind around 10 mph.
Wednesday Night
Mostly clear, with a low around 60.
Thursday
Mostly sunny, with a high near 82.
Thursday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 63. Chance of precipitation is 70%.
Friday
Showers and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. High near 75. Chance of precipitation is 80%.
Friday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 54.
Saturday
A 20 percent chance of showers. Mostly sunny, with a high near 73.
Saturday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 52.
Sunday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 71.
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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:
6:01 am CDT Apr 20, 2026
Forecast Valid:
7am CDT Apr 20, 2026-6pm CDT Apr 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