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.

Light Rain

73°F

23°C

Humidity 84%
Wind Speed SE 8 mph
Barometer 29.95 in (1013.1 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 13 Jun 9:51 am CDT
Extended Forecast for

Saint Charles MO

  • Today

    Today: Showers and possibly a thunderstorm. High near 78. Southeast wind around 7 mph. Chance of precipitation is 90%.

    High: 78 °F

    Showers then
    T-storms

  • Tonight

    Tonight: Showers and thunderstorms likely before 1am, then isolated showers between 1am and 5am. Cloudy, with a low around 69. Northeast wind around 6 mph becoming calm after midnight. Chance of precipitation is 60%.

    Low: 69 °F

    T-storms
    Likely then
    Scattered
    Showers

  • Saturday

    Saturday: Isolated showers between 7am and 1pm, then scattered showers and thunderstorms after 1pm. Mostly cloudy, with a high near 83. North wind 5 to 7 mph. Chance of precipitation is 30%.

    High: 83 °F

    Scattered
    Showers

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 68. North wind around 5 mph becoming calm in the evening.

    Low: 68 °F

    Partly Cloudy

  • Sunday

    Sunday: A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 86. Calm wind becoming north around 5 mph.

    High: 86 °F

    Partly Sunny
    then Slight
    Chance
    Showers

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 69.

    Low: 69 °F

    Chance
    T-storms

  • Monday

    Monday: A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 86.

    High: 86 °F

    Chance
    Showers then
    Chance
    T-storms

  • Monday Night

    Monday Night: A 30 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 71.

    Low: 71 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 89.

    High: 89 °F

    Chance
    T-storms

Detailed Forecast

Today
Showers and possibly a thunderstorm. High near 78. Southeast wind around 7 mph. Chance of precipitation is 90%.
Tonight
Showers and thunderstorms likely before 1am, then isolated showers between 1am and 5am. Cloudy, with a low around 69. Northeast wind around 6 mph becoming calm after midnight. Chance of precipitation is 60%.
Saturday
Isolated showers between 7am and 1pm, then scattered showers and thunderstorms after 1pm. Mostly cloudy, with a high near 83. North wind 5 to 7 mph. Chance of precipitation is 30%.
Saturday Night
Partly cloudy, with a low around 68. North wind around 5 mph becoming calm in the evening.
Sunday
A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 86. Calm wind becoming north around 5 mph.
Sunday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 69.
Monday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 86.
Monday Night
A 30 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 71.
Tuesday
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 89.
Tuesday Night
A 30 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 74.
Wednesday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 90.
Wednesday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.
Juneteenth
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 87.
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Charles MO
 38.78°N 90.51°W (Elev. 597 ft)
Last Update:
8:37 am CDT Jun 13, 2025
Forecast Valid:
10am CDT Jun 13, 2025-6pm CDT Jun 19, 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