National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

St. Louis Lambert International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

Mostly Cloudy

61°F

16°C

Humidity 87%
Wind Speed SE 9 mph
Barometer 30.07 in (1018.2 mb)
Dewpoint 57°F (14°C)
Visibility 8.00 mi
Last update 24 Dec 2:51 pm CST
Extended Forecast for

Saint Charles MO

  • Tonight

    Tonight: Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 53. South wind around 6 mph becoming calm after midnight.

    Low: 53 °F

    Partly Cloudy
    then Patchy
    Fog

  • Christmas Day

    Christmas Day: Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 66. Calm wind becoming northeast around 5 mph in the afternoon.

    High: 66 °F

    Patchy Fog
    then Mostly
    Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 57. East wind around 6 mph becoming southwest after midnight.

    Low: 57 °F

    Mostly Cloudy

  • Friday

    Friday: Sunny, with a high near 70. Southwest wind 5 to 9 mph becoming northwest in the afternoon.

    High: 70 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 46. Light and variable wind.

    Low: 46 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 67.

    High: 67 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 54.

    Low: 54 °F

    Mostly Cloudy

  • Sunday

    Sunday: A chance of rain and thunderstorms, then rain likely after noon. Cloudy, with a high near 59. Chance of precipitation is 60%.

    High: 59 °F

    Rain Likely

  • Sunday Night

    Sunday Night: A 20 percent chance of rain before midnight. Mostly cloudy, with a low around 21.

    Low: 21 °F

    Slight Chance
    Rain then
    Mostly Cloudy

Detailed Forecast

Tonight
Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 53. South wind around 6 mph becoming calm after midnight.
Christmas Day
Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 66. Calm wind becoming northeast around 5 mph in the afternoon.
Thursday Night
Mostly cloudy, with a low around 57. East wind around 6 mph becoming southwest after midnight.
Friday
Sunny, with a high near 70. Southwest wind 5 to 9 mph becoming northwest in the afternoon.
Friday Night
Partly cloudy, with a low around 46. Light and variable wind.
Saturday
Partly sunny, with a high near 67.
Saturday Night
Mostly cloudy, with a low around 54.
Sunday
A chance of rain and thunderstorms, then rain likely after noon. Cloudy, with a high near 59. Chance of precipitation is 60%.
Sunday Night
A 20 percent chance of rain before midnight. Mostly cloudy, with a low around 21.
Monday
Mostly sunny, with a high near 29.
Monday Night
Mostly clear, with a low around 18.
Tuesday
Mostly sunny, with a high near 35.
Tuesday Night
Mostly clear, with a low around 25.
Wednesday
Mostly sunny, with a high near 41.
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:
1:16 pm CST Dec 24, 2025
Forecast Valid:
3pm CST Dec 24, 2025-6pm CST Dec 31, 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