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.

Fog/Mist

79°F

26°C

Humidity 90%
Wind Speed Calm
Barometer 30.04 in (1016.3 mb)
Dewpoint 76°F (24°C)
Visibility 6.00 mi
Heat Index83°F (28°C)
Last update 30 Jul 7:54 am CDT
Extended Forecast for

Ballwin MO

Extreme Heat Warning July 30, 08:04am until July 30, 07:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning July 30, 08:04am until July 30, 07:00pm

    NOW until 7:00pm Wed

    Extreme Heat Warning

  • Today

    High: 95 °F

    Mostly Sunny
    then Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 74. Light and variable wind. Chance of precipitation is 60%.

    Low: 74 °F

    Chance
    T-storms then
    Showers
    Likely

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 81. North wind 3 to 8 mph.

    High: 81 °F

    Chance
    T-storms

  • Thursday Night

    Thursday Night: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Mostly cloudy, with a low around 65. North wind 6 to 9 mph. Chance of precipitation is 20%.

    Low: 65 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 80. Northeast wind 6 to 9 mph.

    High: 80 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 61.

    Low: 61 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

Detailed Forecast

Today
A 30 percent chance of showers and thunderstorms, mainly after 3pm. Mostly sunny, with a high near 95. Heat index values as high as 106. Calm wind.
Tonight
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 74. Light and variable wind. Chance of precipitation is 60%.
Thursday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 81. North wind 3 to 8 mph.
Thursday Night
A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Mostly cloudy, with a low around 65. North wind 6 to 9 mph. Chance of precipitation is 20%.
Friday
Mostly sunny, with a high near 80. Northeast wind 6 to 9 mph.
Friday Night
Mostly clear, with a low around 61.
Saturday
Sunny, with a high near 80.
Saturday Night
Mostly clear, with a low around 60.
Sunday
Sunny, with a high near 83.
Sunday Night
Partly cloudy, with a low around 65.
Monday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 85.
Monday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 67.
Tuesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 87.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Ballwin MO
 38.58°N 90.55°W (Elev. 584 ft)
Last Update:
5:41 am CDT Jul 30, 2025
Forecast Valid:
8am CDT Jul 30, 2025-6pm CDT Aug 5, 2025
 
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