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Deep Moisture and Active Pattern Across Much of the U.S.

An upper level low pressure system in the west may produce strong to isolated strong thunderstorms, and locally heavy rain across portions of the Intermountain West. A cold front across the central U.S. will produce widely scattered severe thunderstorms. Heavy rain; and high surf, rip currents, and coastal flooding will overspread the Gulf Coast as subtropical system Alberto moves north. Read More >

Hazardous Weather Conditions

Current conditions at

St. Louis Lambert International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

Mostly Cloudy

81°F

27°C

Humidity 58%
Wind Speed SW 12 mph
Barometer 29.82 in (1008.6 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 25 May 5:51 pm CDT
Extended Forecast for

Saint Charles MO

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly before 7pm.  Mostly cloudy, with a low around 69. Southwest wind 5 to 10 mph becoming light  after midnight.

    Chance
    T-storms then
    Partly Cloudy

    Low: 69 °F

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after 1pm.  Mostly sunny, with a high near 91. Light west wind.

    Mostly Sunny
    then Slight
    Chance
    T-storms

    High: 91 °F

  • Saturday
    Night

    Saturday Night: Mostly clear, with a low around 70. Southwest wind 3 to 5 mph.

    Mostly Clear

    Low: 70 °F

  • Sunday

    Sunday: Mostly sunny, with a high near 93. Light and variable wind.

    Mostly Sunny

    High: 93 °F

  • Sunday
    Night

    Sunday Night: Mostly clear, with a low around 71. Light southeast wind.

    Mostly Clear

    Low: 71 °F

  • Memorial
    Day

    Memorial Day: Sunny, with a high near 92.

    Sunny

    High: 92 °F

  • Monday
    Night

    Monday Night: Mostly clear, with a low around 70.

    Mostly Clear

    Low: 70 °F

  • Tuesday

    Tuesday: Isolated showers and thunderstorms after 1pm.  Mostly sunny, with a high near 89. Chance of precipitation is 20%.

    Sunny then
    Isolated
    T-storms

    High: 89 °F

  • Tuesday
    Night

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

    Partly Cloudy

    Low: 69 °F

Detailed Forecast

Tonight
A 30 percent chance of showers and thunderstorms, mainly before 7pm. Mostly cloudy, with a low around 69. Southwest wind 5 to 10 mph becoming light after midnight.
Saturday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 91. Light west wind.
Saturday Night
Mostly clear, with a low around 70. Southwest wind 3 to 5 mph.
Sunday
Mostly sunny, with a high near 93. Light and variable wind.
Sunday Night
Mostly clear, with a low around 71. Light southeast wind.
Memorial Day
Sunny, with a high near 92.
Monday Night
Mostly clear, with a low around 70.
Tuesday
Isolated showers and thunderstorms after 1pm. Mostly sunny, with a high near 89. Chance of precipitation is 20%.
Tuesday Night
Partly cloudy, with a low around 69.
Wednesday
Isolated showers and thunderstorms. Partly sunny, with a high near 87. Chance of precipitation is 20%.
Wednesday Night
Partly cloudy, with a low around 70.
Thursday
Isolated showers and thunderstorms. Mostly sunny, with a high near 89. Chance of precipitation is 20%.
Thursday Night
Isolated showers and thunderstorms. Partly cloudy, with a low around 71. Chance of precipitation is 20%.
Friday
Mostly sunny, with a high near 92.
Click Map For Forecast
Point Forecast:
Saint Charles MO
 38.78°N 90.51°W (Elev. 597 ft)
5:43 pm CDT May 25, 2018
6pm CDT May 25, 2018-6pm CDT Jun 1, 2018
 
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