National Weather Service Forecast for: Westmont CA
Issued by: National Weather Service Los Angeles/Oxnard, CA
Updated: 8:27 pm PDT Sep 12, 2026
 
Tonight

Tonight: Patchy fog after 11pm. Otherwise, mostly clear early, then becoming cloudy, with a low around 68. Southwest wind around 5 mph.
Patchy Fog
 Sunday

Sunday: Patchy fog before 11am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 83. Light and variable wind becoming west southwest 5 to 10 mph in the afternoon.
Patchy Fog
then Sunny
 Sunday
Night
Sunday Night: Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 67. West southwest wind 5 to 10 mph becoming southeast after midnight.
Patchy Fog
 Monday

Monday: Patchy fog before 11am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 82. Southeast wind 5 to 10 mph becoming southwest in the afternoon.
Patchy Fog
then Sunny
 Monday
Night
Monday Night: Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 66. West southwest wind 5 to 10 mph becoming southeast after midnight.
Patchy Fog
 Tuesday

Tuesday: Patchy fog before 11am. Otherwise, mostly sunny, with a high near 78.
Patchy Fog
then Sunny
 Tuesday
Night
Tuesday Night: Mostly clear, with a low around 65.
Mostly Clear
 Wednesday

Wednesday: Sunny, with a high near 79.
Sunny
 Wednesday
Night
Wednesday Night: Mostly clear, with a low around 64.
Mostly Clear
Lo 68 °F Hi 83 °F Lo 67 °F Hi 82 °F Lo 66 °F Hi 78 °F Lo 65 °F Hi 79 °F Lo 64 °F

 

Tonight
 
 Patchy fog after 11pm. Otherwise, mostly clear early, then becoming cloudy, with a low around 68. Southwest wind around 5 mph.
Sunday
 
 Patchy fog before 11am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 83. Light and variable wind becoming west southwest 5 to 10 mph in the afternoon.
Sunday Night
 
 Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 67. West southwest wind 5 to 10 mph becoming southeast after midnight.
Monday
 
 Patchy fog before 11am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 82. Southeast wind 5 to 10 mph becoming southwest in the afternoon.
Monday Night
 
 Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 66. West southwest wind 5 to 10 mph becoming southeast after midnight.
Tuesday
 
 Patchy fog before 11am. Otherwise, mostly sunny, with a high near 78.
Tuesday Night
 
 Mostly clear, with a low around 65.
Wednesday
 
 Sunny, with a high near 79.
Wednesday Night
 
 Mostly clear, with a low around 64.
Thursday
 
 Sunny, with a high near 81.
Thursday Night
 
 Mostly clear, with a low around 65.
Friday
 
 Sunny, with a high near 85.
Friday Night
 
 Mostly clear, with a low around 67.
Saturday
 
 Sunny, with a high near 88.

 

Forecast from NOAA-NWS for Westmont CA.