National Weather Service Forecast for: Spring Valley CA
Issued by: National Weather Service San Diego, CA
Updated: 12:05 pm PDT Jun 18, 2026
 
Tonight

Tonight: Patchy fog after 11pm.  Otherwise, increasing clouds, with a low around 59. West wind 5 to 10 mph becoming light  after midnight.
Patchy Fog
Juneteenth

Juneteenth: Mostly cloudy through mid morning, then gradual clearing, with a high near 74. Light northwest wind becoming west 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Becoming
Sunny
Friday
Night
Friday Night: Patchy fog after 11pm.  Otherwise, increasing clouds, with a low around 57. West wind 5 to 10 mph becoming light and variable  after midnight.
Patchy Fog
Saturday

Saturday: Patchy fog before 11am.  Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 74. Light and variable wind becoming west 5 to 10 mph in the morning.
Patchy Fog
then Sunny
Saturday
Night
Saturday Night: Increasing clouds, with a low around 56. Northwest wind 5 to 10 mph becoming light and variable  after midnight. Winds could gust as high as 20 mph.
Increasing
Clouds
Sunday

Sunday: Patchy fog before 11am.  Otherwise, partly sunny, then gradually becoming sunny, with a high near 74.
Patchy Fog
then Sunny
Sunday
Night
Sunday Night: Increasing clouds, with a low around 57.
Increasing
Clouds
Monday

Monday: Partly sunny, then gradually becoming sunny, with a high near 75.
Becoming
Sunny
Monday
Night
Monday Night: Mostly clear, with a low around 58.
Mostly Clear
Lo 59 °F Hi 74 °F Lo 57 °F Hi 74 °F Lo 56 °F Hi 74 °F Lo 57 °F Hi 75 °F Lo 58 °F

 

Tonight
 
Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 59. West wind 5 to 10 mph becoming light after midnight.
Juneteenth
 
Mostly cloudy through mid morning, then gradual clearing, with a high near 74. Light northwest wind becoming west 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Friday Night
 
Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 57. West wind 5 to 10 mph becoming light and variable after midnight.
Saturday
 
Patchy fog before 11am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 74. Light and variable wind becoming west 5 to 10 mph in the morning.
Saturday Night
 
Increasing clouds, with a low around 56. Northwest wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 20 mph.
Sunday
 
Patchy fog before 11am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 74.
Sunday Night
 
Increasing clouds, with a low around 57.
Monday
 
Partly sunny, then gradually becoming sunny, with a high near 75.
Monday Night
 
Mostly clear, with a low around 58.
Tuesday
 
Mostly sunny, with a high near 78.
Tuesday Night
 
Mostly clear, with a low around 61.
Wednesday
 
Sunny, with a high near 81.
Wednesday Night
 
Mostly clear, with a low around 63.
Thursday
 
Sunny, with a high near 82.

 

Forecast from NOAA-NWS for Spring Valley CA.