National Weather Service Forecast for: Ballwin MO
Issued by: National Weather Service Saint Louis, MO
Updated: 5:01 pm CST Dec 17, 2025
 
Tonight

Tonight: Isolated showers after 5am. Increasing clouds, with a temperature rising to around 55 by 5am. South wind 8 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.
Mostly Cloudy
then Isolated
Showers
 Thursday

Thursday: Showers, mainly before 1pm. Temperature falling to around 46 by 5pm. South wind 13 to 16 mph becoming west in the afternoon. Winds could gust as high as 32 mph. Chance of precipitation is 80%.
Showers then
Scattered
Showers
 Thursday
Night
Thursday Night: Mostly clear, with a low around 24. Blustery, with a west wind 10 to 20 mph, with gusts as high as 33 mph.
Partly Cloudy
and Blustery
then Mostly
Clear
 Friday

Friday: Sunny, with a high near 41. West wind 6 to 9 mph becoming south in the afternoon.
Sunny

 Friday
Night
Friday Night: Partly cloudy, with a low around 34. South wind 8 to 10 mph, with gusts as high as 21 mph.
Partly Cloudy

 Saturday

Saturday: Mostly sunny, with a high near 57.
Mostly Sunny

 Saturday
Night
Saturday Night: Partly cloudy, with a low around 27.
Partly Cloudy

 Sunday

Sunday: Mostly sunny, with a high near 44.
Mostly Sunny

 Sunday
Night
Sunday Night: Mostly cloudy, with a low around 31.
Mostly Cloudy
Lo 49 °F⇑ Hi 56 °F⇓ Lo 24 °F Hi 41 °F Lo 34 °F Hi 57 °F Lo 27 °F Hi 44 °F Lo 31 °F

 

Tonight
 
 Isolated showers after 5am. Increasing clouds, with a temperature rising to around 55 by 5am. South wind 8 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.
Thursday
 
 Showers, mainly before 1pm. Temperature falling to around 46 by 5pm. South wind 13 to 16 mph becoming west in the afternoon. Winds could gust as high as 32 mph. Chance of precipitation is 80%.
Thursday Night
 
 Mostly clear, with a low around 24. Blustery, with a west wind 10 to 20 mph, with gusts as high as 33 mph.
Friday
 
 Sunny, with a high near 41. West wind 6 to 9 mph becoming south in the afternoon.
Friday Night
 
 Partly cloudy, with a low around 34. South wind 8 to 10 mph, with gusts as high as 21 mph.
Saturday
 
 Mostly sunny, with a high near 57.
Saturday Night
 
 Partly cloudy, with a low around 27.
Sunday
 
 Mostly sunny, with a high near 44.
Sunday Night
 
 Mostly cloudy, with a low around 31.
Monday
 
 Partly sunny, with a high near 48.
Monday Night
 
 Mostly cloudy, with a low around 42.
Tuesday
 
 Partly sunny, with a high near 60.
Tuesday Night
 
 Mostly cloudy, with a low around 43.
Wednesday
 
 Mostly cloudy, with a high near 60.

 

Forecast from NOAA-NWS for Ballwin MO.