National Weather Service Forecast for: Ballwin MO
Issued by: National Weather Service Saint Louis, MO
Updated: 3:15 am CST Dec 20, 2025
 
Today

Today: Mostly sunny, with a high near 55. South wind 6 to 10 mph becoming northwest in the afternoon. Winds could gust as high as 22 mph.
Mostly Sunny
 Tonight

Tonight: Partly cloudy, with a low around 29. North wind 3 to 6 mph.
Partly Cloudy
 Sunday

Sunday: Sunny, with a high near 44. Light and variable wind becoming east around 5 mph.
Sunny
 Sunday
Night
Sunday Night: Partly cloudy, with a low around 31. Southeast wind 3 to 7 mph.
Partly Cloudy
 Monday

Monday: Partly sunny, with a high near 53. Southeast wind around 8 mph.
Partly Sunny
 Monday
Night
Monday Night: Partly cloudy, with a low around 46.
Partly Cloudy
 Tuesday

Tuesday: Mostly sunny, with a high near 62.
Mostly Sunny
 Tuesday
Night
Tuesday Night: Mostly cloudy, with a low around 49.
Mostly Cloudy
 Wednesday

Wednesday: Mostly cloudy, with a high near 71.
Mostly Cloudy
Hi 55 °F Lo 29 °F Hi 44 °F Lo 31 °F Hi 53 °F Lo 46 °F Hi 62 °F Lo 49 °F Hi 71 °F

 

Today
 
 Mostly sunny, with a high near 55. South wind 6 to 10 mph becoming northwest in the afternoon. Winds could gust as high as 22 mph.
Tonight
 
 Partly cloudy, with a low around 29. North wind 3 to 6 mph.
Sunday
 
 Sunny, with a high near 44. Light and variable wind becoming east around 5 mph.
Sunday Night
 
 Partly cloudy, with a low around 31. Southeast wind 3 to 7 mph.
Monday
 
 Partly sunny, with a high near 53. Southeast wind around 8 mph.
Monday Night
 
 Partly cloudy, with a low around 46.
Tuesday
 
 Mostly sunny, with a high near 62.
Tuesday Night
 
 Mostly cloudy, with a low around 49.
Wednesday
 
 Mostly cloudy, with a high near 71.
Wednesday Night
 
 Partly cloudy, with a low around 59.
Christmas Day
 
 Sunny, with a high near 75.
Thursday Night
 
 Mostly clear, with a low around 54.
Friday
 
 Partly sunny, with a high near 68.

 

Forecast from NOAA-NWS for Ballwin MO.