S
M
T
W
T
F
S
27
86°
71°
28
79°
68°
29
81°
64°
30
77°
67°
1
82°
67°
2
100°
67°
3
102°
72°
4
100°
76°
5
100°
76°
6
98°
69°
7
95°
68°
8
92°
67°
9
88°
69°
10
88°
68°
11
80°
65°
12
75°
63°
13
77°
62°
14
78°
63°
15
84°
62°
16
87°
65°
17
89°
63°
18
88°
64°
19
79°
59°
20
82°
62°
21
81°
63°
22
82°
62°
23
81°
62°
24
81°
61°
25
82°
62°
26
81°
61°
27
77°
56°
28
71°
54°
29
72°
52°
30
73°
52°
31
72°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Tustin
Tustin's October 2026 forecast shows daily high temperatures ranging from 71° to 98°, with overnight lows between 52° and 69°. The average high for October is 82° with an average low of 62°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how October weather will actually feel in Tustin. See also: November | December | January.
