National Weather Service Forecast for: Westmont CA
Issued by: National Weather Service Los Angeles/Oxnard, CA
Updated: 1:06 am PST Feb 2, 2026
 
Overnight

Overnight: Patchy dense fog.  Otherwise, cloudy, with a low around 55. Calm wind.
Patchy Dense
Fog
Monday

Monday: Patchy dense fog before 10am.  Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 74. Calm wind becoming southwest around 5 mph in the afternoon.
Patchy Dense
Fog then
Mostly Sunny
Monday
Night
Monday Night: Patchy fog after 10pm.  Otherwise, increasing clouds, with a low around 53. Calm wind.
Patchy Fog

Tuesday

Tuesday: Patchy fog before 10am.  Otherwise, cloudy through mid morning, then gradual clearing, with a high near 80. Calm wind becoming west around 5 mph in the afternoon.
Patchy Fog
then Sunny
Tuesday
Night
Tuesday Night: Clear, with a low around 56. North wind around 5 mph becoming east in the evening.
Clear

Wednesday

Wednesday: Sunny, with a high near 88.
Sunny

Wednesday
Night
Wednesday Night: Mostly clear, with a low around 58.
Mostly Clear

Thursday

Thursday: Mostly sunny, with a high near 86.
Mostly Sunny

Thursday
Night
Thursday Night: Mostly cloudy, with a low around 57.
Mostly Cloudy

Lo 55 °F Hi 74 °F Lo 53 °F Hi 80 °F Lo 56 °F Hi 88 °F Lo 58 °F Hi 86 °F Lo 57 °F

Air Quality Alert
 

Overnight
 
Patchy dense fog. Otherwise, cloudy, with a low around 55. Calm wind.
Monday
 
Patchy dense fog before 10am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 74. Calm wind becoming southwest around 5 mph in the afternoon.
Monday Night
 
Patchy fog after 10pm. Otherwise, increasing clouds, with a low around 53. Calm wind.
Tuesday
 
Patchy fog before 10am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 80. Calm wind becoming west around 5 mph in the afternoon.
Tuesday Night
 
Clear, with a low around 56. North wind around 5 mph becoming east in the evening.
Wednesday
 
Sunny, with a high near 88.
Wednesday Night
 
Mostly clear, with a low around 58.
Thursday
 
Mostly sunny, with a high near 86.
Thursday Night
 
Mostly cloudy, with a low around 57.
Friday
 
Partly sunny, with a high near 74.
Friday Night
 
Partly cloudy, with a low around 54.
Saturday
 
Sunny, with a high near 75.
Saturday Night
 
Mostly clear, with a low around 54.
Sunday
 
Sunny, with a high near 77.

 

Forecast from NOAA-NWS for Westmont CA.