S
M
T
W
T
F
S
30
79°
65°
31
86°
62°
1
83°
57°
2
85°
61°
3
89°
63°
4
85°
64°
5
85°
67°
6
77°
68°
7
80°
68°
8
85°
60°
9
76°
52°
10
79°
58°
11
84°
56°
12
80°
56°
13
75°
54°
14
75°
51°
15
77°
56°
16
79°
55°
17
78°
55°
18
73°
46°
19
77°
52°
20
77°
51°
21
70°
51°
22
74°
52°
23
75°
52°
24
76°
51°
25
70°
50°
26
72°
51°
27
72°
51°
28
73°
50°
29
71°
48°
30
63°
47°
1
61°
43°
2
59°
39°
3
58°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Long Beach
Long Beach's September 2026 forecast shows daily high temperatures ranging from 58° to 85°, with overnight lows between 39° and 68°. 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 Long Beach. See also: October | November | December.
