National Weather Service Forecast for: Ballwin MO
Issued by: National Weather Service Saint Louis, MO
Updated: 4:46 am CST Feb 2, 2026
 
Today

Today: Partly sunny, with a high near 39. West wind around 5 mph becoming calm in the morning.
Partly Sunny

 Tonight

Tonight: Cloudy, with a low around 28. East wind 3 to 5 mph.
Cloudy

 Tuesday

Tuesday: A 20 percent chance of snow before noon. Mostly cloudy, with a high near 34. Light and variable wind becoming northeast 5 to 7 mph in the morning.
Slight Chance
Snow then
Partly Sunny
 Tuesday
Night
Tuesday Night: Partly cloudy, with a low around 18. North wind around 5 mph becoming calm in the evening.
Partly Cloudy

 Wednesday

Wednesday: Mostly sunny, with a high near 32. Calm wind becoming north around 5 mph.
Mostly Sunny

 Wednesday
Night
Wednesday Night: Partly cloudy, with a low around 17.
Partly Cloudy

 Thursday

Thursday: Mostly sunny, with a high near 42.
Mostly Sunny

 Thursday
Night
Thursday Night: Mostly clear, with a low around 33.
Mostly Clear

 Friday

Friday: Sunny, with a high near 46.
Sunny
Hi 39 °F Lo 28 °F Hi 34 °F Lo 18 °F Hi 32 °F Lo 17 °F Hi 42 °F Lo 33 °F Hi 46 °F

 

Today
 
 Partly sunny, with a high near 39. West wind around 5 mph becoming calm in the morning.
Tonight
 
 Cloudy, with a low around 28. East wind 3 to 5 mph.
Tuesday
 
 A 20 percent chance of snow before noon. Mostly cloudy, with a high near 34. Light and variable wind becoming northeast 5 to 7 mph in the morning.
Tuesday Night
 
 Partly cloudy, with a low around 18. North wind around 5 mph becoming calm in the evening.
Wednesday
 
 Mostly sunny, with a high near 32. Calm wind becoming north around 5 mph.
Wednesday Night
 
 Partly cloudy, with a low around 17.
Thursday
 
 Mostly sunny, with a high near 42.
Thursday Night
 
 Mostly clear, with a low around 33.
Friday
 
 Sunny, with a high near 46.
Friday Night
 
 Mostly clear, with a low around 21.
Saturday
 
 Sunny, with a high near 39.
Saturday Night
 
 Partly cloudy, with a low around 25.
Sunday
 
 Mostly sunny, with a high near 45.

 

Forecast from NOAA-NWS for Ballwin MO.