S
M
T
W
T
F
S
30
88°
65°
31
84°
71°
1
95°
73°
2
81°
70°
3
91°
70°
4
89°
71°
5
83°
65°
6
83°
59°
7
83°
58°
8
87°
58°
9
90°
65°
10
91°
74°
11
79°
64°
12
82°
63°
13
89°
73°
14
81°
59°
15
76°
59°
16
81°
65°
17
84°
68°
18
84°
66°
19
80°
67°
20
87°
66°
21
80°
65°
22
79°
62°
23
78°
58°
24
73°
57°
25
77°
56°
26
76°
57°
27
79°
60°
28
78°
58°
29
78°
59°
30
75°
58°
1
71°
58°
2
75°
59°
3
77°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Pasadena
Pasadena's September 2026 forecast shows daily high temperatures ranging from 71° to 87°, with overnight lows between 56° and 68°. The average high for September is 78° with an average low of 61°. 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 Pasadena. See also: October | November | December.
