S
M
T
W
T
F
S
30
89°
64°
31
86°
65°
1
91°
66°
2
95°
68°
3
92°
68°
4
94°
68°
5
82°
67°
6
76°
61°
7
79°
56°
8
84°
56°
9
89°
59°
10
87°
70°
11
79°
69°
12
76°
69°
13
79°
63°
14
75°
50°
15
72°
54°
16
78°
60°
17
80°
61°
18
82°
57°
19
78°
60°
20
76°
53°
21
68°
51°
22
65°
52°
23
67°
52°
24
69°
50°
25
73°
49°
26
72°
47°
27
76°
52°
28
76°
51°
29
76°
52°
30
75°
51°
1
71°
51°
2
75°
50°
3
75°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Montebello
Montebello's September 2026 forecast shows daily high temperatures ranging from 65° to 82°, with overnight lows between 47° and 63°. The average high for September is 74° with an average low of 53°. 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 Montebello. See also: October | November | December.
