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
103°
73°
5
103°
73°
6
100°
69°
7
98°
70°
8
94°
70°
9
93°
72°
10
89°
68°
11
84°
65°
12
78°
61°
13
81°
61°
14
81°
62°
15
84°
64°
16
87°
65°
17
79°
59°
18
83°
64°
19
82°
63°
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 103°, with overnight lows between 52° and 73°. The average high for October is 84° with an average low of 63°. 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.
