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

Hazardous Weather Conditions

Current conditions at

St. Louis, Spirit Of St. Louis Airport (KSUS)

Lat: 38.66°NLon: 90.66°WElev: 463ft.

Fair

91°F

33°C

Humidity 68%
Wind Speed Calm
Barometer 29.91 in (1011.9 mb)
Dewpoint 79°F (26°C)
Visibility 10.00 mi
Heat Index108°F (42°C)
Last update 25 Jul 6:54 pm CDT
Extended Forecast for

Ellisville MO

Heat Advisory July 26, 11:00am until July 27, 09:00pm
Click here for hazard details and duration
Heat Advisory

  • Tonight

    Tonight: Mostly clear, with a low around 75. Calm wind.

    Low: 75 °F

    Mostly Clear

  • Sunday

    Sunday: Isolated showers and thunderstorms after 4pm. Mostly sunny, with a high near 95. Heat index values as high as 107. Calm wind. Chance of precipitation is 20%.

    High: 95 °F

    Mostly Sunny
    then Isolated
    T-storms

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 77. Calm wind becoming southwest around 5 mph after midnight.

    Low: 77 °F

    Partly Cloudy

  • Monday

    Monday: Sunny and hot, with a high near 97. Heat index values as high as 106. Southwest wind 5 to 8 mph.

    High: 97 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 78. Southwest wind around 6 mph.

    Low: 78 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 93.

    High: 93 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 73.

    Low: 73 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 89.

    High: 89 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 69.

    Low: 69 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 75. Calm wind.
Sunday
Isolated showers and thunderstorms after 4pm. Mostly sunny, with a high near 95. Heat index values as high as 107. Calm wind. Chance of precipitation is 20%.
Sunday Night
Partly cloudy, with a low around 77. Calm wind becoming southwest around 5 mph after midnight.
Monday
Sunny and hot, with a high near 97. Heat index values as high as 106. Southwest wind 5 to 8 mph.
Monday Night
Mostly clear, with a low around 78. Southwest wind around 6 mph.
Tuesday
Mostly sunny, with a high near 93.
Tuesday Night
Partly cloudy, with a low around 73.
Wednesday
Sunny, with a high near 89.
Wednesday Night
Mostly clear, with a low around 69.
Thursday
Sunny, with a high near 89.
Thursday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 70.
Friday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89.
Friday Night
A 20 percent chance of showers and thunderstorms. Some of the storms could produce heavy rainfall. Partly cloudy, with a low around 70.
Saturday
A 20 percent chance of showers. Mostly sunny, with a high near 88.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Ellisville MO
 38.58°N 90.57°W (Elev. 696 ft)
Last Update:
5:56 pm CDT Jul 25, 2026
Forecast Valid:
7pm CDT Jul 25, 2026-6pm CDT Aug 1, 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