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.

Overcast

80°F

27°C

Humidity 56%
Wind Speed SW 8 mph
Barometer 30.05 in (1016.2 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 12 Jun 12:51 pm CDT
Extended Forecast for

Saint Charles MO

  • This Afternoon

    This Afternoon: A 20 percent chance of showers. Cloudy, with a high near 82. South wind around 6 mph.

    High: 82 °F

    Slight Chance
    Showers

  • Tonight

    Tonight: A chance of showers before 1am, then a chance of showers and thunderstorms between 1am and 3am, then showers likely and possibly a thunderstorm after 3am. Cloudy, with a low around 69. Southeast wind 3 to 5 mph. Chance of precipitation is 60%.

    Low: 69 °F

    Chance
    Showers then
    Showers
    Likely

  • Friday

    Friday: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 3pm. High near 79. Southeast wind 5 to 8 mph. Chance of precipitation is 80%.

    High: 79 °F

    Showers

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm before 7pm, then a chance of showers and thunderstorms between 7pm and 1am, then a slight chance of showers after 1am. Mostly cloudy, with a low around 69. South wind 3 to 6 mph. Chance of precipitation is 60%.

    Low: 69 °F

    Showers
    Likely

  • Saturday

    Saturday: A chance of showers, with thunderstorms also possible after 10am. Partly sunny, with a high near 83. Light and variable wind becoming northwest around 6 mph in the morning. Chance of precipitation is 40%.

    High: 83 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 69.

    Low: 69 °F

    Partly Cloudy

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 84.

    High: 84 °F

    Partly Sunny
    then Chance
    Showers

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 68.

    Low: 68 °F

    Slight Chance
    T-storms

  • Monday

    Monday: A 40 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 85.

    High: 85 °F

    Chance
    T-storms

Detailed Forecast

This Afternoon
A 20 percent chance of showers. Cloudy, with a high near 82. South wind around 6 mph.
Tonight
A chance of showers before 1am, then a chance of showers and thunderstorms between 1am and 3am, then showers likely and possibly a thunderstorm after 3am. Cloudy, with a low around 69. Southeast wind 3 to 5 mph. Chance of precipitation is 60%.
Friday
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 3pm. High near 79. Southeast wind 5 to 8 mph. Chance of precipitation is 80%.
Friday Night
Showers likely and possibly a thunderstorm before 7pm, then a chance of showers and thunderstorms between 7pm and 1am, then a slight chance of showers after 1am. Mostly cloudy, with a low around 69. South wind 3 to 6 mph. Chance of precipitation is 60%.
Saturday
A chance of showers, with thunderstorms also possible after 10am. Partly sunny, with a high near 83. Light and variable wind becoming northwest around 6 mph in the morning. Chance of precipitation is 40%.
Saturday Night
Partly cloudy, with a low around 69.
Sunday
A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 84.
Sunday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 68.
Monday
A 40 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 85.
Monday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 70.
Tuesday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90.
Tuesday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73.
Wednesday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Charles MO
 38.78°N 90.51°W (Elev. 597 ft)
Last Update:
11:52 am CDT Jun 12, 2025
Forecast Valid:
12pm CDT Jun 12, 2025-6pm CDT Jun 18, 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