S
M
T
W
T
F
S
30
92°
62°
31
93°
61°
1
92°
62°
2
92°
62°
3
91°
64°
4
90°
61°
5
92°
58°
6
91°
52°
7
85°
53°
8
84°
54°
9
85°
56°
10
87°
59°
11
90°
57°
12
91°
58°
13
89°
61°
14
90°
60°
15
90°
55°
16
87°
56°
17
88°
57°
18
87°
59°
19
89°
57°
20
88°
53°
21
85°
58°
22
82°
58°
23
80°
54°
24
82°
58°
25
82°
55°
26
84°
53°
27
81°
53°
28
81°
56°
29
82°
51°
30
79°
56°
1
79°
60°
2
86°
57°
3
80°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Trabuco Canyon
Trabuco Canyon's September 2026 forecast shows daily high temperatures ranging from 79° to 93°, with overnight lows between 51° and 64°. The average high for September is 86° with an average low of 57°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Trabuco Canyon. See also: October | November | December.
