Current conditions at

St. Louis Lambert International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

Mostly Cloudy and Breezy

30°F

-1°C

Humidity 66%
Wind Speed W 23 G 33 mph
Barometer 29.81 in (1009.6 mb)
Dewpoint 20°F (-7°C)
Visibility 10.00 mi
Wind Chill17°F (-8°C)
Last update 20 Feb 6:51 am CST
Extended Forecast for

Saint John MO

  • Today

    Today: Sunny, with a high near 42. Breezy, with a west wind 10 to 20 mph, with gusts as high as 37 mph.

    High: 42 °F

    Mostly Sunny
    and Breezy
    then Sunny

  • Tonight

    Tonight: A 20 percent chance of snow after 4am.  Increasing clouds, with a low around 28. North wind around 7 mph.

    Low: 28 °F

    Partly Cloudy
    then Slight
    Chance Snow

  • Saturday

    Saturday: A 20 percent chance of snow before 7am.  Partly sunny, with a high near 44. Northwest wind 8 to 10 mph.

    High: 44 °F

    Slight Chance
    Snow then
    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 25. Northwest wind 10 to 14 mph, with gusts as high as 21 mph.

    Low: 25 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 37. Northwest wind 14 to 18 mph, with gusts as high as 31 mph.

    High: 37 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 18.

    Low: 18 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 34.

    High: 34 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 20.

    Low: 20 °F

    Mostly Clear

  • Tuesday

    Tuesday: Partly sunny, with a high near 51.

    High: 51 °F

    Partly Sunny

Detailed Forecast

Today
Sunny, with a high near 42. Breezy, with a west wind 10 to 20 mph, with gusts as high as 37 mph.
Tonight
A 20 percent chance of snow after 4am. Increasing clouds, with a low around 28. North wind around 7 mph.
Saturday
A 20 percent chance of snow before 7am. Partly sunny, with a high near 44. Northwest wind 8 to 10 mph.
Saturday Night
Mostly clear, with a low around 25. Northwest wind 10 to 14 mph, with gusts as high as 21 mph.
Sunday
Sunny, with a high near 37. Northwest wind 14 to 18 mph, with gusts as high as 31 mph.
Sunday Night
Mostly clear, with a low around 18.
Monday
Sunny, with a high near 34.
Monday Night
Mostly clear, with a low around 20.
Tuesday
Partly sunny, with a high near 51.
Tuesday Night
Mostly cloudy, with a low around 41.
Wednesday
Mostly cloudy, with a high near 59.
Wednesday Night
A 20 percent chance of rain. Partly cloudy, with a low around 36.
Thursday
A 20 percent chance of rain. Mostly sunny, with a high near 55.
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ABOUT THIS FORECAST

 
Point Forecast:
Saint John MO
 38.71°N 90.34°W (Elev. 597 ft)
4:51 am CST Feb 20, 2026
6am CST Feb 20, 2026-6pm CST Feb 26, 2026
 
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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