National Weather Service Forecast for: Rancho San Diego CA
Issued by: National Weather Service San Diego, CA
Updated: 12:56 pm PST Dec 17, 2025
 
Overnight

Overnight: Mostly clear, with a low around 50. Calm wind.
Mostly Clear
 Thursday

Thursday: Sunny, with a high near 84. Calm wind becoming west around 5 mph.
Sunny
 Thursday
Night
Thursday Night: Mostly clear, with a low around 54. East wind around 5 mph becoming calm.
Mostly Clear
 Friday

Friday: Sunny, with a high near 80. Calm wind becoming west around 5 mph in the afternoon.
Sunny
 Friday
Night
Friday Night: Mostly clear, with a low around 50. Calm wind.
Mostly Clear
 Saturday

Saturday: Sunny, with a high near 75.
Sunny
 Saturday
Night
Saturday Night: Partly cloudy, with a low around 52.
Partly Cloudy
 Sunday

Sunday: Mostly sunny, with a high near 76.
Mostly Sunny
 Sunday
Night
Sunday Night: Patchy fog after 10pm. Otherwise, partly cloudy, with a low around 50.
Patchy Fog
Lo 50 °F Hi 84 °F Lo 54 °F Hi 80 °F Lo 50 °F Hi 75 °F Lo 52 °F Hi 76 °F Lo 50 °F

 

Overnight
 
 Mostly clear, with a low around 50. Calm wind.
Thursday
 
 Sunny, with a high near 84. Calm wind becoming west around 5 mph.
Thursday Night
 
 Mostly clear, with a low around 54. East wind around 5 mph becoming calm.
Friday
 
 Sunny, with a high near 80. Calm wind becoming west around 5 mph in the afternoon.
Friday Night
 
 Mostly clear, with a low around 50. Calm wind.
Saturday
 
 Sunny, with a high near 75.
Saturday Night
 
 Partly cloudy, with a low around 52.
Sunday
 
 Mostly sunny, with a high near 76.
Sunday Night
 
 Patchy fog after 10pm. Otherwise, partly cloudy, with a low around 50.
Monday
 
 Patchy fog before 10am. Otherwise, mostly sunny, with a high near 75.
Monday Night
 
 Mostly cloudy, with a low around 49.
Tuesday
 
 A slight chance of showers. Partly sunny, with a high near 71.
Tuesday Night
 
 A chance of showers. Mostly cloudy, with a low around 51.
Wednesday
 
 Showers likely. Mostly cloudy, with a high near 72.

 

Forecast from NOAA-NWS for Rancho San Diego CA.