National Weather Service Forecast for: Mehlville MO
Issued by: National Weather Service Saint Louis, MO
Updated: 10:06 pm CST Feb 1, 2026
 
Overnight

Overnight: Mostly cloudy, with a low around 23. Southwest wind around 5 mph becoming calm.
Mostly Cloudy
 Monday

Monday: Partly sunny, with a high near 38. Light and variable wind.
Partly Sunny
 Monday
Night
Monday Night: Mostly cloudy, with a low around 29. Light east wind.
Mostly Cloudy
 Tuesday

Tuesday: A 20 percent chance of snow. Mostly cloudy, with a high near 33. North wind 5 to 7 mph.
Slight Chance
Snow
 Tuesday
Night
Tuesday Night: Mostly cloudy, with a low around 19. North wind around 5 mph becoming calm in the evening.
Mostly Cloudy
 Wednesday

Wednesday: Mostly sunny, with a high near 30.
Mostly Sunny
 Wednesday
Night
Wednesday Night: Mostly clear, with a low around 16.
Mostly Clear
 Thursday

Thursday: Mostly sunny, with a high near 41.
Mostly Sunny
 Thursday
Night
Thursday Night: Mostly clear, with a low around 33.
Mostly Clear
Lo 23 °F Hi 38 °F Lo 29 °F Hi 33 °F Lo 19 °F Hi 30 °F Lo 16 °F Hi 41 °F Lo 33 °F

Hazardous Weather Outlook
 

Overnight
 
 Mostly cloudy, with a low around 23. Southwest wind around 5 mph becoming calm.
Monday
 
 Partly sunny, with a high near 38. Light and variable wind.
Monday Night
 
 Mostly cloudy, with a low around 29. Light east wind.
Tuesday
 
 A 20 percent chance of snow. Mostly cloudy, with a high near 33. North wind 5 to 7 mph.
Tuesday Night
 
 Mostly cloudy, with a low around 19. North wind around 5 mph becoming calm in the evening.
Wednesday
 
 Mostly sunny, with a high near 30.
Wednesday Night
 
 Mostly clear, with a low around 16.
Thursday
 
 Mostly sunny, with a high near 41.
Thursday Night
 
 Mostly clear, with a low around 33.
Friday
 
 Mostly sunny, with a high near 46.
Friday Night
 
 Partly cloudy, with a low around 22.
Saturday
 
 Sunny, with a high near 37.
Saturday Night
 
 Partly cloudy, with a low around 26.
Sunday
 
 Mostly sunny, with a high near 42.

 

Forecast from NOAA-NWS for Mehlville MO.