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.

Fair

64°F

18°C

Humidity 87%
Wind Speed S 7 mph
Barometer 29.85 in (1009.8 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 10 Mar 3:51 am CDT
Extended Forecast for

Saint Charles MO

  • Today

    Today: Sunny, with a high near 84. South wind 7 to 16 mph, with gusts as high as 28 mph.

    High: 84 °F

    Sunny

  • Tonight

    Tonight: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 3am. Low around 52. Southwest wind 14 to 16 mph, with gusts as high as 30 mph. Chance of precipitation is 80%.

    Low: 52 °F

    Slight Chance
    T-storms then
    T-storms

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm before 1pm, then a chance of showers. Temperature falling to around 50 by 5pm. Southwest wind 13 to 18 mph becoming northwest in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 100%.

    High: 65 °F⇓

    T-storms then
    Showers

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 34. Northwest wind 6 to 16 mph, with gusts as high as 25 mph.

    Low: 34 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 56. Light and variable wind becoming southwest 5 to 10 mph in the morning.

    High: 56 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 46. Breezy.

    Low: 46 °F

    Mostly Cloudy
    then Partly
    Cloudy and
    Breezy

  • Friday

    Friday: Partly sunny, with a high near 63.

    High: 63 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 41.

    Low: 41 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 70.

    High: 70 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 84. South wind 7 to 16 mph, with gusts as high as 28 mph.
Tonight
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 3am. Low around 52. Southwest wind 14 to 16 mph, with gusts as high as 30 mph. Chance of precipitation is 80%.
Wednesday
Showers and possibly a thunderstorm before 1pm, then a chance of showers. Temperature falling to around 50 by 5pm. Southwest wind 13 to 18 mph becoming northwest in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 100%.
Wednesday Night
Partly cloudy, with a low around 34. Northwest wind 6 to 16 mph, with gusts as high as 25 mph.
Thursday
Sunny, with a high near 56. Light and variable wind becoming southwest 5 to 10 mph in the morning.
Thursday Night
Partly cloudy, with a low around 46. Breezy.
Friday
Partly sunny, with a high near 63.
Friday Night
Mostly cloudy, with a low around 41.
Saturday
Mostly sunny, with a high near 70.
Saturday Night
A 20 percent chance of rain after 1am. Partly cloudy, with a low around 49.
Sunday
Rain likely. Mostly cloudy, with a high near 62. Breezy. Chance of precipitation is 70%.
Sunday Night
A chance of rain and snow. Mostly cloudy, with a low around 23. Blustery. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 37.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Saint Charles MO
 38.81°N 90.54°W (Elev. 512 ft)
Last Update:
3:46 am CDT Mar 10, 2026
Forecast Valid:
4am CDT Mar 10, 2026-6pm CDT Mar 16, 2026
 
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