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°
79°
9
91°
77°
10
91°
76°
11
93°
78°
12
92°
78°
13
93°
77°
14
92°
76°
15
89°
75°
16
90°
75°
17
91°
76°
18
90°
73°
19
90°
71°
20
88°
71°
21
90°
70°
22
90°
74°
23
89°
73°
24
89°
74°
25
88°
74°
26
89°
73°
27
88°
73°
28
89°
72°
29
88°
73°
30
85°
70°
1
82°
64°
2
79°
63°
3
80°
63°
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 79° to 94°, with overnight lows between 63° 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.
