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

67°F

19°C

Humidity 81%
Wind Speed Calm
Barometer 30.07 in (1017.5 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 7 Sep 9:54 pm CDT
Extended Forecast for

Ballwin MO

  • Tonight

    Tonight: Mostly clear, with a low around 65. Light southeast wind.

    Low: 65 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 95. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 95 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 74. South wind 3 to 6 mph.

    Low: 74 °F

    Mostly Clear

  • Wednesday

    Wednesday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 98. Heat index values as high as 107. South wind 5 to 7 mph. Chance of precipitation is 50%.

    High: 98 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm. Low around 70. Light and variable wind. Chance of precipitation is 90%.

    Low: 70 °F

    Showers
    Likely then
    Showers

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm before 10am, then showers likely between 10am and 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 82. Chance of precipitation is 70%.

    High: 82 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 65.

    Low: 65 °F

    Partly Cloudy

  • Friday

    Friday: A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 86.

    High: 86 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Friday Night

    Friday Night: A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 68.

    Low: 68 °F

    Partly Cloudy
    then Chance
    Showers

Detailed Forecast

Tonight
Mostly clear, with a low around 65. Light southeast wind.
Tuesday
Mostly sunny, with a high near 95. Calm wind becoming southeast around 5 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 74. South wind 3 to 6 mph.
Wednesday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 98. Heat index values as high as 107. South wind 5 to 7 mph. Chance of precipitation is 50%.
Wednesday Night
Showers and possibly a thunderstorm. Low around 70. Light and variable wind. Chance of precipitation is 90%.
Thursday
Showers likely and possibly a thunderstorm before 10am, then showers likely between 10am and 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 82. Chance of precipitation is 70%.
Thursday Night
Partly cloudy, with a low around 65.
Friday
A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 86.
Friday Night
A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 68.
Saturday
A 40 percent chance of showers before 1pm. Mostly sunny, with a high near 90.
Saturday Night
A 20 percent chance of showers. Mostly clear, with a low around 68.
Sunday
A 20 percent chance of showers. Sunny, with a high near 89.
Sunday Night
Mostly clear, with a low around 67.
Monday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 88.
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ABOUT THIS FORECAST

 
Point Forecast:
Ballwin MO
 38.58°N 90.55°W (Elev. 584 ft)
Last Update:
9:26 pm CDT Sep 7, 2026
Forecast Valid:
10pm CDT Sep 7, 2026-6pm CDT Sep 14, 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