National Weather Service Forecast for: Westmont CA
Issued by: National Weather Service Los Angeles/Oxnard, CA
Updated: 11:26 am PDT May 4, 2026
 
This
Afternoon
This Afternoon: A 20 percent chance of rain. Mostly sunny, with a high near 66. West southwest wind around 15 mph, with gusts as high as 20 mph.
Slight Chance
Rain
 Tonight

Tonight: A 20 percent chance of rain. Mostly cloudy, with a low around 55. West southwest wind 10 to 15 mph becoming light west after midnight.
Slight Chance
Rain
 Tuesday

Tuesday: Mostly sunny, with a high near 65. Light west wind becoming west southwest 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
Mostly Sunny
 Tuesday
Night
Tuesday Night: Partly cloudy, with a low around 55. West southwest wind 10 to 15 mph becoming light southwest after midnight. Winds could gust as high as 20 mph.
Partly Cloudy
 Wednesday

Wednesday: Sunny, with a high near 72. Light and variable wind becoming west southwest 5 to 10 mph in the afternoon.
Sunny
 Wednesday
Night
Wednesday Night: Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 56.
Patchy Fog
 Thursday

Thursday: Patchy fog before 11am. Otherwise, mostly sunny, with a high near 75.
Patchy Fog
then Sunny
 Thursday
Night
Thursday Night: Mostly clear, with a low around 59.
Mostly Clear
 Friday

Friday: Sunny, with a high near 77.
Sunny
Hi 66 °F Lo 55 °F Hi 65 °F Lo 55 °F Hi 72 °F Lo 56 °F Hi 75 °F Lo 59 °F Hi 77 °F

 

This Afternoon
 
 A 20 percent chance of rain. Mostly sunny, with a high near 66. West southwest wind around 15 mph, with gusts as high as 20 mph.
Tonight
 
 A 20 percent chance of rain. Mostly cloudy, with a low around 55. West southwest wind 10 to 15 mph becoming light west after midnight.
Tuesday
 
 Mostly sunny, with a high near 65. Light west wind becoming west southwest 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
Tuesday Night
 
 Partly cloudy, with a low around 55. West southwest wind 10 to 15 mph becoming light southwest after midnight. Winds could gust as high as 20 mph.
Wednesday
 
 Sunny, with a high near 72. Light and variable wind becoming west southwest 5 to 10 mph in the afternoon.
Wednesday Night
 
 Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 56.
Thursday
 
 Patchy fog before 11am. Otherwise, mostly sunny, with a high near 75.
Thursday Night
 
 Mostly clear, with a low around 59.
Friday
 
 Sunny, with a high near 77.
Friday Night
 
 Mostly clear, with a low around 59.
Saturday
 
 Sunny, with a high near 79.
Saturday Night
 
 Mostly clear, with a low around 60.
Sunday
 
 Sunny, with a high near 80.

 

Forecast from NOAA-NWS for Westmont CA.