National Weather Service Forecast for: Fullerton CA
Issued by: National Weather Service San Diego, CA
Updated: 2:03 am PDT Apr 25, 2025
 
Today

Today: Partly sunny, with a high near 65. Light southwest wind increasing to 5 to 10 mph in the afternoon.
Partly Sunny

 Tonight

Tonight: A slight chance of showers after 11pm. Mostly cloudy, with a low around 51. West wind 5 to 10 mph becoming light and variable after midnight. Chance of precipitation is 20%.
Slight Chance
Showers
 Saturday

Saturday: A chance of showers, with thunderstorms also possible after 11am. Mostly cloudy, with a high near 64. Light and variable wind becoming southwest 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Chance
Showers
 Saturday
Night
Saturday Night: A slight chance of showers before 11pm. Mostly cloudy, with a low around 50. Southwest wind 5 to 10 mph becoming light and variable after midnight. Chance of precipitation is 20%.
Slight Chance
Showers then
Cloudy
 Sunday

Sunday: Cloudy, then gradually becoming mostly sunny, with a high near 66. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Decreasing
Clouds
 Sunday
Night
Sunday Night: Mostly cloudy, with a low around 50.
Mostly Cloudy

 Monday

Monday: Mostly cloudy through mid morning, then gradual clearing, with a high near 72.
Becoming
Sunny
 Monday
Night
Monday Night: Mostly clear, with a low around 52.
Mostly Clear

 Tuesday

Tuesday: Sunny, with a high near 76.
Sunny
Hi 65 °F Lo 51 °F Hi 64 °F Lo 50 °F Hi 66 °F Lo 50 °F Hi 72 °F Lo 52 °F Hi 76 °F

 

Today
 
 Partly sunny, with a high near 65. Light southwest wind increasing to 5 to 10 mph in the afternoon.
Tonight
 
 A slight chance of showers after 11pm. Mostly cloudy, with a low around 51. West wind 5 to 10 mph becoming light and variable after midnight. Chance of precipitation is 20%.
Saturday
 
 A chance of showers, with thunderstorms also possible after 11am. Mostly cloudy, with a high near 64. Light and variable wind becoming southwest 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
 
 A slight chance of showers before 11pm. Mostly cloudy, with a low around 50. Southwest wind 5 to 10 mph becoming light and variable after midnight. Chance of precipitation is 20%.
Sunday
 
 Cloudy, then gradually becoming mostly sunny, with a high near 66. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Sunday Night
 
 Mostly cloudy, with a low around 50.
Monday
 
 Mostly cloudy through mid morning, then gradual clearing, with a high near 72.
Monday Night
 
 Mostly clear, with a low around 52.
Tuesday
 
 Sunny, with a high near 76.
Tuesday Night
 
 Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 55.
Wednesday
 
 Patchy fog. Otherwise, mostly sunny, with a high near 74.
Wednesday Night
 
 Partly cloudy, with a low around 55.
Thursday
 
 Mostly sunny, with a high near 74.

 

Forecast from NOAA-NWS for Fullerton CA.