National Weather Service Forecast for: Fullerton CA
Issued by: National Weather Service San Diego, CA
Updated: 12:16 pm PDT Jun 11, 2025
 
Tonight

Tonight: Patchy fog after 2am. Otherwise, increasing clouds, with a low around 62. Southwest wind 5 to 10 mph becoming light in the evening.
Mostly Clear
then Patchy
Fog
 Thursday

Thursday: Patchy fog before 11am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 80. Light south wind becoming southwest 5 to 10 mph in the morning.
Patchy Fog
then Sunny
 Thursday
Night
Thursday Night: Increasing clouds, with a low around 61. Southwest wind around 5 mph becoming calm in the evening.
Increasing
Clouds
 Friday

Friday: Mostly cloudy, then gradually becoming sunny, with a high near 82. Light south wind becoming southwest 5 to 10 mph in the afternoon.
Decreasing
Clouds
 Friday
Night
Friday Night: Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 63. Southwest wind around 5 mph becoming calm in the evening.
Patchy Fog

 Saturday

Saturday: Patchy fog before 11am. Otherwise, partly sunny, with a high near 85.
Patchy Fog
then Partly
Sunny
 Saturday
Night
Saturday Night: Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 64.
Patchy Fog

 Sunday

Sunday: Patchy fog before 11am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 88.
Patchy Fog
then Mostly
Sunny
 Sunday
Night
Sunday Night: Mostly clear, with a low around 64.
Mostly Clear
Lo 62 °F Hi 80 °F Lo 61 °F Hi 82 °F Lo 63 °F Hi 85 °F Lo 64 °F Hi 88 °F Lo 64 °F

 

Tonight
 
 Patchy fog after 2am. Otherwise, increasing clouds, with a low around 62. Southwest wind 5 to 10 mph becoming light in the evening.
Thursday
 
 Patchy fog before 11am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 80. Light south wind becoming southwest 5 to 10 mph in the morning.
Thursday Night
 
 Increasing clouds, with a low around 61. Southwest wind around 5 mph becoming calm in the evening.
Friday
 
 Mostly cloudy, then gradually becoming sunny, with a high near 82. Light south wind becoming southwest 5 to 10 mph in the afternoon.
Friday Night
 
 Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 63. Southwest wind around 5 mph becoming calm in the evening.
Saturday
 
 Patchy fog before 11am. Otherwise, partly sunny, with a high near 85.
Saturday Night
 
 Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 64.
Sunday
 
 Patchy fog before 11am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 88.
Sunday Night
 
 Mostly clear, with a low around 64.
Monday
 
 Mostly sunny, with a high near 85.
Monday Night
 
 Partly cloudy, with a low around 62.
Tuesday
 
 Mostly sunny, with a high near 81.
Tuesday Night
 
 Partly cloudy, with a low around 62.
Wednesday
 
 Mostly sunny, with a high near 84.

 

Forecast from NOAA-NWS for Fullerton CA.