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.

A Few Clouds

62°F

17°C

Humidity 41%
Wind Speed W 8 mph
Barometer 29.74 in (1006.5 mb)
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Last update 7 Nov 5:51 pm CST
Extended Forecast for

Saint Charles MO

  • Tonight

    Tonight: Increasing clouds, with a low around 41. West wind 3 to 8 mph.

    Low: 41 °F

    Increasing
    Clouds

  • Saturday

    Saturday: A 30 percent chance of rain, mainly after 4pm. Mostly cloudy, with a high near 65. Calm wind becoming south around 6 mph in the afternoon.

    High: 65 °F

    Partly Sunny
    then Chance
    Rain

  • Saturday Night

    Saturday Night: A chance of rain before 3am, then a chance of sprinkles and flurries between 3am and 5am, then a chance of flurries after 5am. Mostly cloudy, with a low around 35. Northwest wind 7 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 30%.

    Low: 35 °F

    Chance Rain
    then Chance
    Sprinkles/Flurries

  • Sunday

    Sunday: A chance of flurries before 1pm, then a chance of sprinkles and flurries between 1pm and 4pm, then a chance of flurries after 4pm. Mostly sunny, with a high near 39. Northwest wind 14 to 17 mph, with gusts as high as 29 mph.

    High: 39 °F

    Mostly Sunny
    then Chance
    Sprinkles/Flurries

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 26. Northwest wind around 11 mph, with gusts as high as 22 mph.

    Low: 26 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 41.

    High: 41 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 28.

    Low: 28 °F

    Mostly Clear

  • Veterans Day

    Veterans Day: Partly sunny, with a high near 57.

    High: 57 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 44.

    Low: 44 °F

    Mostly Clear

Detailed Forecast

Tonight
Increasing clouds, with a low around 41. West wind 3 to 8 mph.
Saturday
A 30 percent chance of rain, mainly after 4pm. Mostly cloudy, with a high near 65. Calm wind becoming south around 6 mph in the afternoon.
Saturday Night
A chance of rain before 3am, then a chance of sprinkles and flurries between 3am and 5am, then a chance of flurries after 5am. Mostly cloudy, with a low around 35. Northwest wind 7 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 30%.
Sunday
A chance of flurries before 1pm, then a chance of sprinkles and flurries between 1pm and 4pm, then a chance of flurries after 4pm. Mostly sunny, with a high near 39. Northwest wind 14 to 17 mph, with gusts as high as 29 mph.
Sunday Night
Mostly clear, with a low around 26. Northwest wind around 11 mph, with gusts as high as 22 mph.
Monday
Sunny, with a high near 41.
Monday Night
Mostly clear, with a low around 28.
Veterans Day
Partly sunny, with a high near 57.
Tuesday Night
Mostly clear, with a low around 44.
Wednesday
Sunny, with a high near 63.
Wednesday Night
Mostly clear, with a low around 39.
Thursday
Mostly sunny, with a high near 61.
Thursday Night
Partly cloudy, with a low around 44.
Friday
Mostly sunny, with a high near 66.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Saint Charles MO
 38.78°N 90.51°W (Elev. 597 ft)
Last Update:
5:16 pm CST Nov 7, 2025
Forecast Valid:
6pm CST Nov 7, 2025-6pm CST Nov 14, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation