National Weather Service Forecast for: 3 Miles NNW Fullerton Municipal CA
Issued by: National Weather Service Los Angeles/Oxnard, CA
Updated: 4:31 pm PST Feb 1, 2026
 
Tonight

Tonight: Partly cloudy, with a low around 50. Calm wind.
Partly Cloudy
 Monday

Monday: Mostly sunny, with a high near 75. Calm wind becoming south southwest around 5 mph in the afternoon.
Mostly Sunny
 Monday
Night
Monday Night: Mostly clear, with a low around 48. Calm wind.
Mostly Clear
 Tuesday

Tuesday: Sunny, with a high near 83. Calm wind becoming west around 5 mph.
Sunny
 Tuesday
Night
Tuesday Night: Clear, with a low around 51. Northeast wind around 5 mph.
Clear
 Wednesday

Wednesday: Sunny, with a high near 90.
Sunny
 Wednesday
Night
Wednesday Night: Mostly clear, with a low around 53.
Mostly Clear
 Thursday

Thursday: Mostly sunny, with a high near 88.
Mostly Sunny
 Thursday
Night
Thursday Night: Mostly cloudy, with a low around 55.
Mostly Cloudy
Lo 50 °F Hi 75 °F Lo 48 °F Hi 83 °F Lo 51 °F Hi 90 °F Lo 53 °F Hi 88 °F Lo 55 °F

Air Quality Alert
 

Tonight
 
 Partly cloudy, with a low around 50. Calm wind.
Monday
 
 Mostly sunny, with a high near 75. Calm wind becoming south southwest around 5 mph in the afternoon.
Monday Night
 
 Mostly clear, with a low around 48. Calm wind.
Tuesday
 
 Sunny, with a high near 83. Calm wind becoming west around 5 mph.
Tuesday Night
 
 Clear, with a low around 51. Northeast wind around 5 mph.
Wednesday
 
 Sunny, with a high near 90.
Wednesday Night
 
 Mostly clear, with a low around 53.
Thursday
 
 Mostly sunny, with a high near 88.
Thursday Night
 
 Mostly cloudy, with a low around 55.
Friday
 
 Partly sunny, with a high near 75.
Friday Night
 
 Patchy fog. Otherwise, mostly cloudy, with a low around 54.
Saturday
 
 Patchy fog. Otherwise, partly sunny, with a high near 76.
Saturday Night
 
 Patchy fog. Otherwise, mostly cloudy, with a low around 54.
Sunday
 
 Patchy fog. Otherwise, mostly sunny, with a high near 79.

 

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