S
M
T
W
T
F
S
28
71°
63°
29
72°
63°
30
73°
64°
1
73°
64°
2
77°
61°
3
80°
61°
4
79°
64°
5
80°
63°
6
79°
64°
7
80°
62°
8
81°
63°
9
79°
64°
10
78°
65°
11
79°
63°
12
81°
64°
13
83°
66°
14
87°
67°
15
83°
65°
16
84°
67°
17
84°
66°
18
84°
66°
19
83°
68°
20
85°
68°
21
85°
67°
22
83°
68°
23
84°
66°
24
82°
63°
25
80°
63°
26
80°
64°
27
82°
63°
28
83°
64°
29
84°
65°
30
85°
66°
31
86°
68°
1
85°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Tustin
Tustin's July 2026 forecast shows daily high temperatures ranging from 77° to 87°, with overnight lows between 61° and 68°. The average high for July is 82° with an average low of 65°. 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 Tustin. See also: August | September | October.
