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.

Partly Cloudy

73°F

23°C

Humidity 40%
Wind Speed Vrbl 6 mph
Barometer 30.06 in (1017.2 mb)
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Last update 11 May 9:51 pm CDT
Extended Forecast for

Saint Charles MO

  • Tonight

    Tonight: Mostly cloudy, with a low around 59. Northeast wind 3 to 5 mph.

    Low: 59 °F

    Mostly Cloudy

  • Monday

    Monday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4pm. Cloudy, with a high near 75. East wind 3 to 8 mph. Chance of precipitation is 60%.

    High: 75 °F

    Showers
    Likely

  • Monday Night

    Monday Night: A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and midnight. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 61. East wind around 6 mph becoming calm after midnight. Chance of precipitation is 40%.

    Low: 61 °F

    Chance
    T-storms then
    Patchy Fog

  • Tuesday

    Tuesday: A chance of showers, with thunderstorms also possible after 10am. Patchy fog before 8am. Otherwise, partly sunny, with a high near 79. Light south wind. Chance of precipitation is 50%.

    High: 79 °F

    Chance
    Showers and
    Patchy Fog
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 61. Light south wind.

    Low: 61 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 85.

    High: 85 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 68.

    Low: 68 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 91.

    High: 91 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 64.

    Low: 64 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 59. Northeast wind 3 to 5 mph.
Monday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4pm. Cloudy, with a high near 75. East wind 3 to 8 mph. Chance of precipitation is 60%.
Monday Night
A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and midnight. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 61. East wind around 6 mph becoming calm after midnight. Chance of precipitation is 40%.
Tuesday
A chance of showers, with thunderstorms also possible after 10am. Patchy fog before 8am. Otherwise, partly sunny, with a high near 79. Light south wind. Chance of precipitation is 50%.
Tuesday Night
Mostly clear, with a low around 61. Light south wind.
Wednesday
Sunny, with a high near 85.
Wednesday Night
Mostly clear, with a low around 68.
Thursday
Mostly sunny, with a high near 91.
Thursday Night
Partly cloudy, with a low around 64.
Friday
A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 85.
Friday Night
A 30 percent chance of showers and thunderstorms. Mostly clear, with a low around 61.
Saturday
Mostly sunny, with a high near 80.
Saturday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 58.
Sunday
A 40 percent chance of showers. Partly sunny, with a high near 76.
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:
9:22 pm CDT May 11, 2025
Forecast Valid:
10pm CDT May 11, 2025-6pm CDT May 18, 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