S
M
T
W
T
F
S
28
80°
67°
29
80°
64°
30
82°
65°
1
85°
67°
2
83°
67°
3
85°
68°
4
86°
69°
5
87°
69°
6
85°
66°
7
79°
63°
8
79°
63°
9
80°
64°
10
82°
66°
11
85°
67°
12
86°
69°
13
86°
69°
14
87°
68°
15
87°
69°
16
86°
69°
17
86°
68°
18
85°
69°
19
86°
69°
20
86°
68°
21
87°
69°
22
86°
69°
23
87°
68°
24
87°
69°
25
86°
68°
26
86°
69°
27
88°
68°
28
88°
68°
29
84°
66°
30
86°
67°
31
87°
66°
1
88°
66°
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 79° to 88°, with overnight lows between 63° and 69°. The average high for July is 85° 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.
