S
M
T
W
T
F
S
27
73°
35°
28
74°
40°
29
75°
40°
30
66°
59°
1
66°
55°
2
62°
37°
3
63°
31°
4
62°
44°
5
58°
30°
6
68°
28°
7
70°
44°
8
62°
38°
9
64°
50°
10
76°
52°
11
74°
49°
12
67°
43°
13
56°
40°
14
57°
39°
15
57°
41°
16
57°
40°
17
54°
37°
18
56°
38°
19
55°
35°
20
50°
31°
21
52°
37°
22
56°
39°
23
58°
39°
24
49°
38°
25
47°
36°
26
46°
34°
27
46°
30°
28
51°
38°
29
56°
40°
30
55°
39°
31
56°
38°
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 46° to 76°, with overnight lows between 30° and 52°. The average high for October is 57° with an average low of 39°. 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.
