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

68°F

20°C

Humidity 78%
Wind Speed S 6 mph
Barometer 29.61 in (1001.6 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 20 May 8:51 am CDT
Extended Forecast for

Saint Charles MO

  • Today

    Today: A 40 percent chance of showers and thunderstorms, mainly before 5pm. Mostly sunny, with a high near 80. South wind 10 to 15 mph, with gusts as high as 28 mph.

    High: 80 °F

    Chance
    T-storms

  • Tonight

    Tonight: Mostly clear, with a low around 54. West wind 9 to 13 mph, with gusts as high as 28 mph.

    Low: 54 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 71. West wind 14 to 17 mph, with gusts as high as 26 mph.

    High: 71 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 50. Northwest wind 9 to 13 mph, with gusts as high as 23 mph.

    Low: 50 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 67. Northwest wind around 11 mph, with gusts as high as 22 mph.

    High: 67 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 47.

    Low: 47 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 69.

    High: 69 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A 20 percent chance of showers. Mostly cloudy, with a low around 54.

    Low: 54 °F

    Slight Chance
    Showers

  • Saturday

    Saturday: A 50 percent chance of showers. Partly sunny, with a high near 67.

    High: 67 °F

    Chance
    Showers

Detailed Forecast

Today
A 40 percent chance of showers and thunderstorms, mainly before 5pm. Mostly sunny, with a high near 80. South wind 10 to 15 mph, with gusts as high as 28 mph.
Tonight
Mostly clear, with a low around 54. West wind 9 to 13 mph, with gusts as high as 28 mph.
Wednesday
Sunny, with a high near 71. West wind 14 to 17 mph, with gusts as high as 26 mph.
Wednesday Night
Mostly clear, with a low around 50. Northwest wind 9 to 13 mph, with gusts as high as 23 mph.
Thursday
Mostly sunny, with a high near 67. Northwest wind around 11 mph, with gusts as high as 22 mph.
Thursday Night
Mostly clear, with a low around 47.
Friday
Mostly sunny, with a high near 69.
Friday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 54.
Saturday
A 50 percent chance of showers. Partly sunny, with a high near 67.
Saturday Night
Showers likely, mainly after 1am. Mostly cloudy, with a low around 55. Chance of precipitation is 60%.
Sunday
Showers likely. Mostly cloudy, with a high near 68. Chance of precipitation is 60%.
Sunday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 54. Chance of precipitation is 60%.
Memorial Day
Showers and thunderstorms likely. Mostly cloudy, with a high near 68. Chance of precipitation is 60%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Saint Charles MO
 38.78°N 90.51°W (Elev. 597 ft)
Last Update:
5:52 am CDT May 20, 2025
Forecast Valid:
10am CDT May 20, 2025-6pm CDT May 26, 2025
 
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