S
M
T
W
T
F
S
30
80°
55°
31
79°
60°
1
79°
59°
2
80°
60°
3
80°
61°
4
79°
61°
5
77°
54°
6
76°
59°
7
77°
59°
8
77°
58°
9
78°
58°
10
78°
57°
11
77°
57°
12
77°
58°
13
78°
60°
14
78°
60°
15
76°
58°
16
76°
57°
17
73°
58°
18
73°
50°
19
72°
45°
20
63°
51°
21
66°
50°
22
66°
44°
23
63°
45°
24
63°
52°
25
69°
55°
26
66°
54°
27
63°
51°
28
64°
51°
29
64°
53°
30
63°
53°
1
61°
50°
2
61°
43°
3
60°
42°
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 60° to 80°, with overnight lows between 42° and 61°. The average high for September is 72° with an average low of 54°. 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.
