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.

Partly Cloudy

60°F

16°C

Humidity 65%
Wind Speed S 9 mph
Barometer 30.02 in (1016.2 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 4 Nov 10:51 pm CST
Extended Forecast for

Saint Charles MO

  • Tonight

    Tonight: Partly cloudy, with a low around 54. Southwest wind around 10 mph, with gusts as high as 20 mph.

    Low: 54 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 68. Southwest wind 8 to 13 mph becoming north in the afternoon. Winds could gust as high as 23 mph.

    High: 68 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 40. North wind around 6 mph becoming light and variable in the evening.

    Low: 40 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 64. Southeast wind 5 to 13 mph, with gusts as high as 23 mph.

    High: 64 °F

    Sunny

  • Thursday Night

    Thursday Night: A 30 percent chance of showers after midnight. Mostly cloudy, with a low around 55. Southeast wind around 10 mph becoming southwest after midnight.

    Low: 55 °F

    Mostly Cloudy
    then Chance
    Showers

  • Friday

    Friday: A 30 percent chance of showers before noon. Mostly sunny, with a high near 70.

    High: 70 °F

    Chance
    Showers then
    Sunny

  • Friday Night

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

    Low: 44 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 66.

    High: 66 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 20 percent chance of rain before midnight. Partly cloudy, with a low around 38.

    Low: 38 °F

    Slight Chance
    Rain then
    Partly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 54. Southwest wind around 10 mph, with gusts as high as 20 mph.
Wednesday
Sunny, with a high near 68. Southwest wind 8 to 13 mph becoming north in the afternoon. Winds could gust as high as 23 mph.
Wednesday Night
Clear, with a low around 40. North wind around 6 mph becoming light and variable in the evening.
Thursday
Sunny, with a high near 64. Southeast wind 5 to 13 mph, with gusts as high as 23 mph.
Thursday Night
A 30 percent chance of showers after midnight. Mostly cloudy, with a low around 55. Southeast wind around 10 mph becoming southwest after midnight.
Friday
A 30 percent chance of showers before noon. Mostly sunny, with a high near 70.
Friday Night
Mostly clear, with a low around 44.
Saturday
Mostly sunny, with a high near 66.
Saturday Night
A 20 percent chance of rain before midnight. Partly cloudy, with a low around 38.
Sunday
Mostly sunny, with a high near 44.
Sunday Night
Partly cloudy, with a low around 27.
Monday
Sunny, with a high near 42.
Monday Night
Mostly clear, with a low around 28.
Veterans Day
Mostly sunny, with a high near 54.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Saint Charles MO
 38.78°N 90.51°W (Elev. 597 ft)
Last Update:
10:36 pm CST Nov 4, 2025
Forecast Valid:
11pm CST Nov 4, 2025-6pm CST Nov 11, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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