S
M
T
W
T
F
S
28
91°
74°
29
94°
69°
30
91°
68°
1
85°
66°
2
86°
68°
3
94°
67°
4
88°
64°
5
88°
66°
6
87°
67°
7
89°
67°
8
89°
66°
9
88°
65°
10
86°
64°
11
91°
66°
12
93°
67°
13
94°
65°
14
94°
64°
15
87°
66°
16
81°
63°
17
90°
69°
18
92°
71°
19
92°
70°
20
91°
69°
21
92°
70°
22
92°
71°
23
91°
70°
24
92°
70°
25
91°
69°
26
89°
70°
27
88°
69°
28
89°
68°
29
86°
68°
30
88°
67°
31
82°
66°
1
81°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Fullerton
Fullerton's July 2026 forecast shows daily high temperatures ranging from 81° to 94°, with overnight lows between 62° and 71°. The average high for July is 89° with an average low of 67°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how July weather will actually feel in Fullerton. See also: August | September | October.
