NWS Forecast for Westmont CA

National Weather Service Forecast for: Westmont CA
Issued by: National Weather Service Los Angeles/Oxnard, CA

Updated: 3:42 pm PDT Jul 12, 2026

This Afternoon Mostly Cloudy	Tonight Mostly Cloudy	Monday Decreasing Clouds	Monday Night Patchy Fog	Tuesday Patchy Fog then Sunny	Tuesday Night Partly Cloudy	Wednesday Sunny	Wednesday Night Mostly Clear	Thursday Mostly Sunny
Hi 79 °F	Lo 67 °F	Hi 79 °F	Lo 68 °F	Hi 84 °F	Lo 69 °F	Hi 90 °F	Lo 72 °F	Hi 86 °F

Extreme Heat Watch
Heat Advisory

This Afternoon	Mostly cloudy, with a high near 79. West southwest wind around 10 mph.
Tonight	Mostly cloudy, with a low around 67. West wind 5 to 10 mph.
Monday	Cloudy, then gradually becoming mostly sunny, with a high near 79. Light west southwest wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 15 mph.
Monday Night	Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 68. Southwest wind 5 to 10 mph.
Tuesday	Patchy fog before 11am. Otherwise, mostly sunny, with a high near 84. West southwest wind 5 to 15 mph.
Tuesday Night	Partly cloudy, with a low around 69.
Wednesday	Sunny, with a high near 90.
Wednesday Night	Mostly clear, with a low around 72.
Thursday	Mostly sunny, with a high near 86.
Thursday Night	Partly cloudy, with a low around 69.
Friday	Mostly sunny, with a high near 82.
Friday Night	Partly cloudy, with a low around 68.
Saturday	A slight chance of showers. Partly sunny, with a high near 81.

Forecast from NOAA-NWS for Westmont CA.