S
M
T
W
T
F
S
28
82°
63°
29
88°
65°
30
91°
69°
1
100°
74°
2
105°
74°
3
104°
74°
4
99°
74°
5
92°
69°
6
90°
67°
7
92°
66°
8
87°
64°
9
89°
66°
10
89°
67°
11
90°
65°
12
83°
67°
13
83°
61°
14
81°
61°
15
80°
60°
16
81°
61°
17
82°
62°
18
82°
62°
19
83°
66°
20
85°
68°
21
83°
68°
22
88°
67°
23
83°
68°
24
85°
67°
25
88°
68°
26
89°
69°
27
89°
69°
28
88°
68°
29
88°
68°
30
87°
63°
31
81°
61°
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 80° to 105°, with overnight lows between 60° and 74°. The average high for July is 88° with an average low of 66°. 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.
