Showers and Storms in the East; Dangerously Hot and Dry in the West

A frontal boundary will bring scattered showers and storms to portions of the Central and Eastern U.S. through the end of the week. Meanwhile, dangerous heat will intensify across the Intermountain West and expand into the Central U.S. by early next week. Elevated wildfire conditions will develop across portions of the Northern/Central Plains and air quality issues will persist in the Northwest. Read More >

Hazardous Weather Conditions

Current conditions at

St. Louis Lambert International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

Overcast

77°F

25°C

Humidity 82%
Wind Speed Calm
Barometer 30.04 in (1015.9 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 6 Aug 2:51 am CDT
Extended Forecast for

Saint Charles MO

Flood Watch August 6, 03:26am until August 6, 01:00pm
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch August 6, 03:26am until August 6, 01:00pm

    NOW until 1:00pm Thu

    Flood Watch

  • Overnight

    Low: 71 °F

    Heavy Rain

  • Thursday

    Thursday: Showers and thunderstorms, mainly before 1pm. Some of the storms could produce heavy rainfall.  High near 81. North wind around 6 mph becoming south in the morning.  Chance of precipitation is 100%.

    High: 81 °F

    Heavy Rain
    then Showers
    Likely

  • Thursday Night

    Thursday Night: Scattered showers and thunderstorms, mainly after 10pm.  Mostly cloudy, with a low around 71. Light south wind.  Chance of precipitation is 40%.

    Low: 71 °F

    Scattered
    T-storms

  • Friday

    Friday: Scattered showers and thunderstorms, mainly between 4pm and 5pm.  Increasing clouds, with a high near 88. Southwest wind 3 to 5 mph.  Chance of precipitation is 30%.

    High: 88 °F

    Scattered
    T-storms

  • Friday Night

    Friday Night: A 40 percent chance of showers and thunderstorms, mainly between 7pm and 1am.  Partly cloudy, with a low around 72. Light southwest wind.

    Low: 72 °F

    Chance
    T-storms

  • Saturday

    Saturday: Sunny, with a high near 90.

    High: 90 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 74.

    Low: 74 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 92.

    High: 92 °F

    Mostly Sunny

Detailed Forecast

Overnight
Showers and thunderstorms. Some of the storms could produce heavy rainfall. Low around 71. Light southwest wind. Chance of precipitation is 80%.
Thursday
Showers and thunderstorms, mainly before 1pm. Some of the storms could produce heavy rainfall. High near 81. North wind around 6 mph becoming south in the morning. Chance of precipitation is 100%.
Thursday Night
Scattered showers and thunderstorms, mainly after 10pm. Mostly cloudy, with a low around 71. Light south wind. Chance of precipitation is 40%.
Friday
Scattered showers and thunderstorms, mainly between 4pm and 5pm. Increasing clouds, with a high near 88. Southwest wind 3 to 5 mph. Chance of precipitation is 30%.
Friday Night
A 40 percent chance of showers and thunderstorms, mainly between 7pm and 1am. Partly cloudy, with a low around 72. Light southwest wind.
Saturday
Sunny, with a high near 90.
Saturday Night
Mostly clear, with a low around 74.
Sunday
Mostly sunny, with a high near 92.
Sunday Night
Mostly clear, with a low around 76.
Monday
Sunny, with a high near 93.
Monday Night
Mostly clear, with a low around 77.
Tuesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92.
Tuesday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 74.
Wednesday
A 40 percent chance of showers and thunderstorms. Partly 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)
2:46 am CDT Aug 6, 2026
3am CDT Aug 6, 2026-6pm CDT Aug 12, 2026
 
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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