Current conditions at

St. Louis Lambert International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

Mostly Cloudy

31°F

-1°C

Humidity 31%
Wind Speed W 10 G 18 mph
Barometer 30.26 in (1026.1 mb)
Dewpoint 4°F (-16°C)
Visibility 10.00 mi
Wind Chill22°F (-6°C)
Last update 17 Mar 2:51 pm CDT
Extended Forecast for

Saint Charles MO

  • Tonight

    Tonight: A 40 percent chance of snow, mainly before 1am.  Mostly cloudy, with a low around 32. Southeast wind 6 to 13 mph, with gusts as high as 26 mph.

    Low: 32 °F

    Chance Snow

  • Wednesday

    Wednesday: Partly sunny, then gradually becoming sunny, with a high near 63. South wind 7 to 10 mph becoming west in the afternoon.

    High: 63 °F

    Becoming
    Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 46. Light and variable wind becoming south around 5 mph after midnight.

    Low: 46 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, then gradually becoming sunny, with a high near 73. South wind 5 to 7 mph becoming northwest in the afternoon.

    High: 73 °F

    Decreasing
    Clouds

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 44. North wind around 6 mph becoming calm  after midnight.

    Low: 44 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 73.

    High: 73 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 51.

    Low: 51 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 57.

    Low: 57 °F

    Mostly Clear

Detailed Forecast

Tonight
A 40 percent chance of snow, mainly before 1am. Mostly cloudy, with a low around 32. Southeast wind 6 to 13 mph, with gusts as high as 26 mph.
Wednesday
Partly sunny, then gradually becoming sunny, with a high near 63. South wind 7 to 10 mph becoming west in the afternoon.
Wednesday Night
Mostly cloudy, with a low around 46. Light and variable wind becoming south around 5 mph after midnight.
Thursday
Mostly cloudy, then gradually becoming sunny, with a high near 73. South wind 5 to 7 mph becoming northwest in the afternoon.
Thursday Night
Mostly clear, with a low around 44. North wind around 6 mph becoming calm after midnight.
Friday
Sunny, with a high near 73.
Friday Night
Partly cloudy, with a low around 51.
Saturday
Sunny, with a high near 81.
Saturday Night
Mostly clear, with a low around 57.
Sunday
Mostly sunny, with a high near 79.
Sunday Night
Partly cloudy, with a low around 41.
Monday
Mostly sunny, with a high near 55.
Monday Night
Mostly cloudy, with a low around 38.
Tuesday
Mostly sunny, with a high near 58.
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Charles MO
 38.78°N 90.51°W (Elev. 597 ft)
2:56 pm CDT Mar 17, 2026
3pm CDT Mar 17, 2026-6pm CDT Mar 24, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database