National Weather Service Forecast for: San Dimas 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. Partly sunny, with a high near 63. West southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Slight Chance
Rain
 Tonight

Tonight: A 30 percent chance of rain, mainly before 11pm. Mostly cloudy, with a low around 50. West southwest wind 10 to 15 mph becoming light west in the evening. New precipitation amounts of less than a tenth of an inch possible.
Chance Rain
 Tuesday

Tuesday: A 30 percent chance of rain, mainly after 11am. Partly sunny, with a high near 63. Light west wind becoming west southwest 5 to 10 mph in the afternoon. Winds could gust as high as 15 mph. New precipitation amounts of less than a tenth of an inch possible.
Chance Rain
 Tuesday
Night
Tuesday Night: Partly cloudy, with a low around 51. West southwest wind 5 to 10 mph becoming light south southwest after midnight.
Partly Cloudy
 Wednesday

Wednesday: Sunny, with a high near 74. Calm wind becoming southwest around 5 mph in the afternoon.
Sunny
 Wednesday
Night
Wednesday Night: Clear, with a low around 54.
Clear
 Thursday

Thursday: Sunny, with a high near 83.
Sunny
 Thursday
Night
Thursday Night: Clear, with a low around 58.
Clear
 Friday

Friday: Sunny, with a high near 85.
Sunny
Hi 63 °F Lo 50 °F Hi 63 °F Lo 51 °F Hi 74 °F Lo 54 °F Hi 83 °F Lo 58 °F Hi 85 °F

 

This Afternoon
 
 A 20 percent chance of rain. Partly sunny, with a high near 63. West southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Tonight
 
 A 30 percent chance of rain, mainly before 11pm. Mostly cloudy, with a low around 50. West southwest wind 10 to 15 mph becoming light west in the evening. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
 
 A 30 percent chance of rain, mainly after 11am. Partly sunny, with a high near 63. Light west wind becoming west southwest 5 to 10 mph in the afternoon. Winds could gust as high as 15 mph. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
 
 Partly cloudy, with a low around 51. West southwest wind 5 to 10 mph becoming light south southwest after midnight.
Wednesday
 
 Sunny, with a high near 74. Calm wind becoming southwest around 5 mph in the afternoon.
Wednesday Night
 
 Clear, with a low around 54.
Thursday
 
 Sunny, with a high near 83.
Thursday Night
 
 Clear, with a low around 58.
Friday
 
 Sunny, with a high near 85.
Friday Night
 
 Clear, with a low around 60.
Saturday
 
 Sunny, with a high near 87.
Saturday Night
 
 Clear, with a low around 62.
Sunday
 
 Sunny, with a high near 90.

 

Forecast from NOAA-NWS for San Dimas CA.