National Weather Service Forecast for: Rancho Santa Margarita CA
Issued by: National Weather Service San Diego, CA
Updated: 7:55 pm PST Dec 4, 2025
 
Overnight

Overnight: Mostly clear, with a low around 47. Northeast wind around 5 mph.
Mostly Clear
 Friday

Friday: Sunny, with a high near 68. Calm wind becoming southwest around 5 mph in the afternoon.
Sunny
 Friday
Night
Friday Night: Mostly clear, with a low around 49. Calm wind.
Mostly Clear
 Saturday

Saturday: Sunny, with a high near 69. Calm wind becoming southwest around 5 mph.
Sunny
 Saturday
Night
Saturday Night: Mostly clear, with a low around 50. Calm wind.
Mostly Clear
 Sunday

Sunday: Sunny, with a high near 73.
Sunny
 Sunday
Night
Sunday Night: Mostly clear, with a low around 53.
Mostly Clear
 Monday

Monday: Sunny, with a high near 76.
Sunny
 Monday
Night
Monday Night: Mostly clear, with a low around 55.
Mostly Clear
Lo 47 °F Hi 68 °F Lo 49 °F Hi 69 °F Lo 50 °F Hi 73 °F Lo 53 °F Hi 76 °F Lo 55 °F

 

Overnight
 
 Mostly clear, with a low around 47. Northeast wind around 5 mph.
Friday
 
 Sunny, with a high near 68. Calm wind becoming southwest around 5 mph in the afternoon.
Friday Night
 
 Mostly clear, with a low around 49. Calm wind.
Saturday
 
 Sunny, with a high near 69. Calm wind becoming southwest around 5 mph.
Saturday Night
 
 Mostly clear, with a low around 50. Calm wind.
Sunday
 
 Sunny, with a high near 73.
Sunday Night
 
 Mostly clear, with a low around 53.
Monday
 
 Sunny, with a high near 76.
Monday Night
 
 Mostly clear, with a low around 55.
Tuesday
 
 Sunny, with a high near 79.
Tuesday Night
 
 Mostly clear, with a low around 56.
Wednesday
 
 Sunny, with a high near 77.
Wednesday Night
 
 Mostly clear, with a low around 55.
Thursday
 
 Sunny, with a high near 77.

 

Forecast from NOAA-NWS for Rancho Santa Margarita CA.