S
M
T
W
T
F
S
30
99°
70°
31
97°
71°
1
96°
70°
2
97°
72°
3
92°
66°
4
90°
66°
5
94°
69°
6
94°
70°
7
93°
70°
8
94°
69°
9
95°
71°
10
96°
71°
11
95°
70°
12
94°
69°
13
90°
67°
14
86°
64°
15
85°
61°
16
85°
61°
17
84°
60°
18
85°
61°
19
87°
62°
20
88°
62°
21
87°
63°
22
91°
64°
23
90°
63°
24
86°
64°
25
89°
67°
26
90°
67°
27
89°
66°
28
82°
65°
29
83°
65°
30
85°
66°
1
86°
65°
2
90°
62°
3
90°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Sierra Madre
Sierra Madre's September 2026 forecast shows daily high temperatures ranging from 82° to 99°, with overnight lows between 60° and 72°. The average high for September is 90° with an average low of 66°. 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 Sierra Madre. See also: October | November | December.
