10-day forecast for Fullerton, CA: 55° to 78°, with precipitation expected on 1 day. The table below breaks each day into morning, afternoon, evening and overnight.
78°
Best day: Wednesday, October 28
66° · 0.28 in
Worst day: Thursday, October 22
Tap any day below to see morning, afternoon, evening and overnight.
Fri, 2369° / 58°0.02
Morning60°feels 60°
Afternoon69°feels 68°
Evening64°feels 64°
Overnight58°feels 57°
69 °
Fullerton, Friday, 23 October
Light rain. High 69°, low 58°.
Pressure29.97 inHg
Wind2.8 mph W
Humidity60%
Visibility6.2 mi
Dew point54°
Sat, 2473° / 55°0
Morning56°feels 56°
Afternoon72°feels 72°
Evening65°feels 65°
Overnight57°feels 57°
73 °
Fullerton, Saturday, 24 October
Clear. High 73°, low 55°.
Pressure29.94 inHg
Wind3.3 mph SW
Humidity64%
Visibility6.2 mi
Dew point58°
Sun, 2576° / 58°0
Morning60°feels 59°
Afternoon76°feels 76°
Evening66°feels 66°
Overnight61°feels 61°
76 °
Fullerton, Sunday, 25 October
Clear. High 76°, low 58°.
Pressure30.03 inHg
Wind2.7 mph SW
Humidity60%
Visibility6.2 mi
Dew point59°
Mon, 2677° / 58°0
Morning63°feels 62°
Afternoon73°feels 73°
Evening72°feels 72°
Overnight61°feels 61°
77 °
Fullerton, Monday, 26 October
Overcast. High 77°, low 58°.
Pressure30.06 inHg
Wind5.3 mph NE
Humidity47%
Visibility—
Dew point50°
Tue, 2775° / 57°0
Morning61°feels 60°
Afternoon71°feels 71°
Evening71°feels 70°
Overnight63°feels 63°
75 °
Fullerton, Tuesday, 27 October
Mostly clear. High 75°, low 57°.
Pressure29.97 inHg
Wind4.6 mph E
Humidity54%
Visibility—
Dew point52°
Wed, 2878° / 65°0
Morning69°feels 69°
Afternoon75°feels 74°
Evening74°feels 74°
Overnight69°feels 69°
78 °
Fullerton, Wednesday, 28 October
Overcast. High 78°, low 65°.
Pressure29.91 inHg
Wind9.6 mph SW
Humidity46%
Visibility—
Dew point51°
Thu, 2975° / 67°0
Morning68°feels 68°
Afternoon71°feels 71°
Evening73°feels 72°
Overnight69°feels 68°
75 °
Fullerton, Thursday, 29 October
Overcast. High 75°, low 67°.
Pressure29.88 inHg
Wind9.1 mph SW
Humidity55%
Visibility—
Dew point53°
Fri, 3074° / 66°0
Morning68°feels 67°
Afternoon71°feels 70°
Evening71°feels 70°
Overnight67°feels 67°
74 °
Fullerton, Friday, 30 October
Clear. High 74°, low 66°.
Pressure29.97 inHg
Wind10.6 mph SW
Humidity55%
Visibility—
Dew point53°
Sat, 3171° / 65°0
Morning66°feels 65°
Afternoon68°feels 67°
Evening68°feels 67°
Overnight66°feels 65°
71 °
Fullerton, Saturday, 31 October
Overcast. High 71°, low 65°.
Pressure29.88 inHg
Wind11.1 mph S
Humidity53%
Visibility—
Dew point50°
About this forecast
How reliable is a 10-day forecast?
The first 3–5 days are the most reliable, typically within 2–4°. From day six to ten the models show the trend: the direction of change is right more often than the exact numbers.
What does the time-of-day table show?
Temperature in Fullerton, CA around 8am, 2pm, 8pm and 2am each day — handy for planning a walk, a drive or work outdoors.
How is the best day chosen?
We weigh the daytime high against precipitation: a warm, dry day scores highest.