National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Dangerous Heat in the Southwest; Severe Thunderstorms from the Central Plains into the Ohio Valley

Dangerous heat will build across the Southwest U.S. through the end of the week with daytime highs of 110-115°F. Isolated to widely scattered severe storms are expected across parts of the central and southern High Plains, Great Lakes into the Ohio Valley, and parts of the Ozarks to Lower Mississippi Valley today. Read More >

Current conditions at

St. Louis Lambert International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

Partly Cloudy

88°F

31°C

Humidity 50%
Wind Speed NW 10 mph
Barometer 29.93 in (1012.1 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Heat Index91°F (33°C)
Last update 26 Aug 6:51 pm CDT
Extended Forecast for

2 Miles ENE Saint Charles MO

  • Tonight

    Tonight: Patchy fog after 5am. Otherwise, mostly clear, with a low around 67. Northwest wind 5 to 8 mph becoming calm in the evening.

    Low: 67 °F

    Mostly Clear
    then Patchy
    Fog

  • Thursday

    Thursday: Patchy fog between 7am and 8am. Otherwise, sunny, with a high near 88. Calm wind becoming north 5 to 7 mph in the morning.

    High: 88 °F

    Patchy Fog
    then Sunny

  • Thursday Night

    Thursday Night: Patchy fog after 5am. Otherwise, mostly clear, with a low around 63. North wind 5 to 7 mph becoming calm in the evening.

    Low: 63 °F

    Mostly Clear
    then Patchy
    Fog

  • Friday

    Friday: Patchy fog before 8am. Otherwise, sunny, with a high near 86. Calm wind becoming northeast around 5 mph in the afternoon.

    High: 86 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 63. Northeast wind around 5 mph becoming light and variable in the evening.

    Low: 63 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 90.

    High: 90 °F

    Mostly Sunny

  • Saturday Night

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

    Low: 69 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 96.

    High: 96 °F

    Mostly Sunny

  • Sunday Night

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

    Low: 74 °F

    Mostly Clear

Detailed Forecast

Tonight
Patchy fog after 5am. Otherwise, mostly clear, with a low around 67. Northwest wind 5 to 8 mph becoming calm in the evening.
Thursday
Patchy fog between 7am and 8am. Otherwise, sunny, with a high near 88. Calm wind becoming north 5 to 7 mph in the morning.
Thursday Night
Patchy fog after 5am. Otherwise, mostly clear, with a low around 63. North wind 5 to 7 mph becoming calm in the evening.
Friday
Patchy fog before 8am. Otherwise, sunny, with a high near 86. Calm wind becoming northeast around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 63. Northeast wind around 5 mph becoming light and variable in the evening.
Saturday
Mostly sunny, with a high near 90.
Saturday Night
Partly cloudy, with a low around 69.
Sunday
Mostly sunny, with a high near 96.
Sunday Night
Mostly clear, with a low around 74.
Monday
Mostly sunny and hot, with a high near 98.
Monday Night
Mostly clear, with a low around 77.
Tuesday
Mostly sunny and hot, with a high near 98.
Tuesday Night
Partly cloudy, with a low around 77.
Wednesday
Mostly sunny and hot, with a high near 97.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ENE Saint Charles MO
 38.8°N 90.48°W (Elev. 456 ft)
Last Update:
6:01 pm CDT Aug 26, 2026
Forecast Valid:
7pm CDT Aug 26, 2026-6pm CDT Sep 2, 2026
 
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Additional Resources

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Chance of Precipitation