National Weather Service Forecast for: San Dimas CA
Issued by: National Weather Service Los Angeles/Oxnard, CA
Updated: 5:53 pm PDT Jun 19, 2026
 
Tonight

Tonight: Increasing clouds, with a low around 60. West southwest wind 5 to 10 mph becoming light southwest in the evening. Winds could gust as high as 15 mph.
Increasing
Clouds
 Saturday

Saturday: Cloudy through mid morning, then gradual clearing, with a high near 77. Light south southwest wind becoming west southwest 5 to 10 mph in the afternoon. Winds could gust as high as 15 mph.
Gradual
Clearing
 Saturday
Night
Saturday Night: Increasing clouds, with a low around 61. West southwest wind 5 to 10 mph becoming light south southwest after midnight. Winds could gust as high as 15 mph.
Increasing
Clouds
 Sunday

Sunday: Cloudy through mid morning, then gradual clearing, with a high near 78. Light south southwest wind becoming southwest 5 to 10 mph in the afternoon.
Becoming
Sunny
 Sunday
Night
Sunday Night: Mostly clear, with a low around 61. Southwest wind 5 to 10 mph becoming light in the evening.
Mostly Clear
 Monday

Monday: Sunny, with a high near 85.
Sunny
 Monday
Night
Monday Night: Mostly clear, with a low around 59.
Mostly Clear
 Tuesday

Tuesday: Sunny, with a high near 90.
Sunny
 Tuesday
Night
Tuesday Night: Mostly clear, with a low around 62.
Mostly Clear
Lo 60 °F Hi 77 °F Lo 61 °F Hi 78 °F Lo 61 °F Hi 85 °F Lo 59 °F Hi 90 °F Lo 62 °F

Extreme Heat Watch
Air Quality Alert
 

Tonight
 
 Increasing clouds, with a low around 60. West southwest wind 5 to 10 mph becoming light southwest in the evening. Winds could gust as high as 15 mph.
Saturday
 
 Cloudy through mid morning, then gradual clearing, with a high near 77. Light south southwest wind becoming west southwest 5 to 10 mph in the afternoon. Winds could gust as high as 15 mph.
Saturday Night
 
 Increasing clouds, with a low around 61. West southwest wind 5 to 10 mph becoming light south southwest after midnight. Winds could gust as high as 15 mph.
Sunday
 
 Cloudy through mid morning, then gradual clearing, with a high near 78. Light south southwest wind becoming southwest 5 to 10 mph in the afternoon.
Sunday Night
 
 Mostly clear, with a low around 61. Southwest wind 5 to 10 mph becoming light in the evening.
Monday
 
 Sunny, with a high near 85.
Monday Night
 
 Mostly clear, with a low around 59.
Tuesday
 
 Sunny, with a high near 90.
Tuesday Night
 
 Mostly clear, with a low around 62.
Wednesday
 
 Sunny, with a high near 91.
Wednesday Night
 
 Mostly clear, with a low around 63.
Thursday
 
 Sunny, with a high near 91.
Thursday Night
 
 Mostly clear, with a low around 62.
Friday
 
 Sunny, with a high near 86.

 

Forecast from NOAA-NWS for San Dimas CA.