S
M
T
W
T
F
S
30
97°
78°
31
90°
78°
1
87°
79°
2
96°
80°
3
93°
75°
4
93°
80°
5
91°
79°
6
91°
80°
7
95°
78°
8
94°
80°
9
91°
79°
10
92°
78°
11
94°
77°
12
97°
80°
13
93°
77°
14
94°
78°
15
95°
77°
16
93°
79°
17
89°
76°
18
94°
72°
19
93°
72°
20
92°
74°
21
91°
73°
22
90°
72°
23
90°
72°
24
91°
72°
25
90°
73°
26
91°
72°
27
83°
73°
28
85°
72°
29
86°
73°
30
86°
72°
1
87°
72°
2
85°
71°
3
84°
72°
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 83° to 95°, with overnight lows between 71° and 79°. The average high for September is 89° with an average low of 73°. 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.
