National Weather Service Forecast for: 3 Miles NNW Fullerton Municipal CA
Issued by: National Weather Service Los Angeles/Oxnard, CA
Updated: 12:46 am PDT Sep 13, 2026
 
Overnight

Overnight: Patchy fog. Otherwise, cloudy, with a low around 69. South southwest wind around 5 mph.
Patchy Fog
 Sunday

Sunday: Patchy fog before 11am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 86. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Patchy Fog
then Sunny
 Sunday
Night
Sunday Night: Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 67. Southwest wind around 5 mph becoming south southeast after midnight.
Patchy Fog
 Monday

Monday: Patchy fog before 11am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 84. South southeast wind 5 to 10 mph.
Patchy Fog
then Sunny
 Monday
Night
Monday Night: Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 65. West southwest wind 5 to 10 mph becoming south southeast after midnight.
Patchy Fog
 Tuesday

Tuesday: Patchy fog before 11am. Otherwise, mostly sunny, with a high near 81.
Patchy Fog
then Sunny
 Tuesday
Night
Tuesday Night: Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 64.
Patchy Fog
 Wednesday

Wednesday: Patchy fog before 11am. Otherwise, mostly sunny, with a high near 81.
Patchy Fog
then Sunny
 Wednesday
Night
Wednesday Night: Mostly clear, with a low around 64.
Mostly Clear
Lo 69 °F Hi 86 °F Lo 67 °F Hi 84 °F Lo 65 °F Hi 81 °F Lo 64 °F Hi 81 °F Lo 64 °F

 

Overnight
 
 Patchy fog. Otherwise, cloudy, with a low around 69. South southwest wind around 5 mph.
Sunday
 
 Patchy fog before 11am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 86. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Sunday Night
 
 Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 67. Southwest wind around 5 mph becoming south southeast after midnight.
Monday
 
 Patchy fog before 11am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 84. South southeast wind 5 to 10 mph.
Monday Night
 
 Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 65. West southwest wind 5 to 10 mph becoming south southeast after midnight.
Tuesday
 
 Patchy fog before 11am. Otherwise, mostly sunny, with a high near 81.
Tuesday Night
 
 Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 64.
Wednesday
 
 Patchy fog before 11am. Otherwise, mostly sunny, with a high near 81.
Wednesday Night
 
 Mostly clear, with a low around 64.
Thursday
 
 Sunny, with a high near 84.
Thursday Night
 
 Clear, with a low around 65.
Friday
 
 Sunny, with a high near 89.
Friday Night
 
 Clear, with a low around 67.
Saturday
 
 Sunny, with a high near 92.

 

Forecast from NOAA-NWS for 3 Miles NNW Fullerton Municipal CA.