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

Extreme Heat Lingers; Severe Thunderstorms for Portions of the Plains and Southeast; Heavy Rainfall Threats

Gusty winds and heavy rainfall may impact the Big Island of Hawaii as a nearby tropical system passes west of the islands. From the Southwest U.S., Rockies and across the Gulf Coast, heavy rainfall could lead to isolated flash flooding. Severe thunderstorms are expected for areas of the Plains, Gulf Coast and Southeast through Tuesday. Extreme heat lingers for the southern Plains and Southwest. Read More >

Current conditions at

St. Louis Lambert International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

Mostly Cloudy

61°F

16°C

Humidity 90%
Wind Speed Calm
Barometer 30.07 in (1017.4 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 24 Aug 5:51 am CDT
Extended Forecast for

Maryland Heights MO

  • Today

    Today: Widespread dense fog, mainly before 7am. Otherwise, mostly sunny, with a high near 84. Light and variable wind.

    High: 84 °F

    Dense Fog
    then Mostly
    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 65. East wind 3 to 6 mph.

    Low: 65 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 87. Southeast wind 5 to 7 mph.

    High: 87 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 69. East wind around 6 mph becoming calm in the evening.

    Low: 69 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers, with thunderstorms also possible after 4pm. Mostly sunny, with a high near 90. Calm wind becoming west around 6 mph in the afternoon. Chance of precipitation is 20%.

    High: 90 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 68.

    Low: 68 °F

    Chance
    Showers

  • Thursday

    Thursday: Sunny, with a high near 88.

    High: 88 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 66.

    Low: 66 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 88.

    High: 88 °F

    Sunny

Detailed Forecast

Today
Widespread dense fog, mainly before 7am. Otherwise, mostly sunny, with a high near 84. Light and variable wind.
Tonight
Partly cloudy, with a low around 65. East wind 3 to 6 mph.
Tuesday
Mostly sunny, with a high near 87. Southeast wind 5 to 7 mph.
Tuesday Night
Mostly cloudy, with a low around 69. East wind around 6 mph becoming calm in the evening.
Wednesday
A slight chance of showers, with thunderstorms also possible after 4pm. Mostly sunny, with a high near 90. Calm wind becoming west around 6 mph in the afternoon. Chance of precipitation is 20%.
Wednesday Night
A 30 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 68.
Thursday
Sunny, with a high near 88.
Thursday Night
Mostly clear, with a low around 66.
Friday
Sunny, with a high near 88.
Friday Night
Mostly clear, with a low around 68.
Saturday
Partly sunny, with a high near 91.
Saturday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 73.
Sunday
Partly sunny, with a high near 94.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Maryland Heights MO
 38.72°N 90.48°W (Elev. 440 ft)
Last Update:
5:41 am CDT Aug 24, 2026
Forecast Valid:
6am CDT Aug 24, 2026-6pm CDT Aug 30, 2026
 
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