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.

A Few Clouds

73°F

23°C

Humidity 62%
Wind Speed W 13 mph
Barometer 29.95 in (1013.3 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 16 Apr 11:51 am CDT
Extended Forecast for

Saint Charles MO

  • This Afternoon

    This Afternoon: Sunny, with a high near 83. Southwest wind around 7 mph.

    High: 83 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 62. South wind 3 to 6 mph.

    Low: 62 °F

    Mostly Clear

  • Friday

    Friday: A 50 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 86. South wind 6 to 14 mph, with gusts as high as 25 mph.

    High: 86 °F

    Mostly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: Showers and thunderstorms, mainly before 4am, then showers and possibly a thunderstorm after 4am. Low around 49. South wind 11 to 14 mph becoming west after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 90%.

    Low: 49 °F

    T-storms

  • Saturday

    Saturday: A chance of showers and thunderstorms. Mostly sunny, with a high near 61. Northwest wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 40%.

    High: 61 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 41.

    Low: 41 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 66.

    High: 66 °F

    Sunny

  • Sunday Night

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

    Low: 44 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 73.

    High: 73 °F

    Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 83. Southwest wind around 7 mph.
Tonight
Mostly clear, with a low around 62. South wind 3 to 6 mph.
Friday
A 50 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 86. South wind 6 to 14 mph, with gusts as high as 25 mph.
Friday Night
Showers and thunderstorms, mainly before 4am, then showers and possibly a thunderstorm after 4am. Low around 49. South wind 11 to 14 mph becoming west after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 90%.
Saturday
A chance of showers and thunderstorms. Mostly sunny, with a high near 61. Northwest wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 40%.
Saturday Night
Mostly clear, with a low around 41.
Sunday
Sunny, with a high near 66.
Sunday Night
Mostly clear, with a low around 44.
Monday
Sunny, with a high near 73.
Monday Night
Mostly clear, with a low around 53.
Tuesday
Mostly sunny, with a high near 76.
Tuesday Night
A 20 percent chance of showers. Partly cloudy, with a low around 56.
Wednesday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 80.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Charles MO
 38.78°N 90.54°W (Elev. 515 ft)
Last Update:
9:01 am CDT Apr 16, 2026
Forecast Valid:
12pm CDT Apr 16, 2026-6pm CDT Apr 22, 2026
 
Forecast Discussion
 
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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