S
M
T
W
T
F
S
30
78°
53°
31
81°
51°
1
74°
52°
2
73°
56°
3
75°
57°
4
75°
51°
5
77°
51°
6
76°
55°
7
75°
50°
8
76°
49°
9
75°
55°
10
73°
55°
11
77°
49°
12
73°
48°
13
73°
48°
14
74°
49°
15
76°
53°
16
78°
53°
17
78°
52°
18
73°
46°
19
72°
51°
20
72°
51°
21
71°
46°
22
71°
49°
23
76°
50°
24
75°
51°
25
76°
52°
26
75°
44°
27
74°
45°
28
70°
44°
29
70°
43°
30
68°
42°
1
Hist. Avg.
71°
47°
2
Hist. Avg.
71°
46°
3
Hist. Avg.
71°
46°
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 68° to 81°, with overnight lows between 42° and 57°. The average high for September is 74° with an average low of 50°. 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.
