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

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

Lat: 38.66°NLon: 90.66°WElev: 463ft.

Mostly Cloudy

43°F

6°C

Humidity 71%
Wind Speed Vrbl 3 mph
Barometer 29.88 in (1012.3 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Last update 6 Dec 8:54 pm CST
Extended Forecast for

Ballwin MO

  • Tonight

    Tonight: A slight chance of rain between midnight and 1am. Cloudy, with a steady temperature around 39. South wind 3 to 7 mph. Winds could gust as high as 20 mph. Chance of precipitation is 20%.

    Low: 39 °F

    Cloudy then
    Slight Chance
    Rain

  • Sunday

    Sunday: A slight chance of drizzle before 3pm. Cloudy, with a temperature rising to near 39 by 9am, then falling to around 32 during the remainder of the day. Light and variable wind becoming north 6 to 11 mph in the morning. Winds could gust as high as 21 mph.

    High: 39 °F⇓

    Slight Chance
    Drizzle

  • Sunday Night

    Sunday Night: Cloudy, with a low around 19. North wind 6 to 10 mph, with gusts as high as 20 mph.

    Low: 19 °F

    Cloudy

  • Monday

    Monday: Mostly cloudy, then gradually becoming sunny, with a high near 34. North wind around 5 mph becoming calm in the morning.

    High: 34 °F

    Decreasing
    Clouds

  • Monday Night

    Monday Night: Partly cloudy, with a low around 26. Light and variable wind becoming southwest 5 to 8 mph in the evening.

    Low: 26 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 52.

    High: 52 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 40.

    Low: 40 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 48.

    High: 48 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 28.

    Low: 28 °F

    Mostly Cloudy
    then Slight
    Chance Snow

Detailed Forecast

Tonight
A slight chance of rain between midnight and 1am. Cloudy, with a steady temperature around 39. South wind 3 to 7 mph. Winds could gust as high as 20 mph. Chance of precipitation is 20%.
Sunday
A slight chance of drizzle before 3pm. Cloudy, with a temperature rising to near 39 by 9am, then falling to around 32 during the remainder of the day. Light and variable wind becoming north 6 to 11 mph in the morning. Winds could gust as high as 21 mph.
Sunday Night
Cloudy, with a low around 19. North wind 6 to 10 mph, with gusts as high as 20 mph.
Monday
Mostly cloudy, then gradually becoming sunny, with a high near 34. North wind around 5 mph becoming calm in the morning.
Monday Night
Partly cloudy, with a low around 26. Light and variable wind becoming southwest 5 to 8 mph in the evening.
Tuesday
Mostly sunny, with a high near 52.
Tuesday Night
Mostly cloudy, with a low around 40.
Wednesday
Partly sunny, with a high near 48.
Wednesday Night
A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 28.
Thursday
A 20 percent chance of snow before noon. Mostly cloudy, with a high near 39.
Thursday Night
Mostly cloudy, with a low around 20.
Friday
Partly sunny, with a high near 28.
Friday Night
Partly cloudy, with a low around 10.
Saturday
Mostly sunny, with a high near 24.
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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:
7:52 pm CST Dec 6, 2025
Forecast Valid:
9pm CST Dec 6, 2025-6pm CST Dec 13, 2025
 
Forecast Discussion
 
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Additional Resources

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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