S
M
T
W
T
F
S
30
79°
57°
31
75°
56°
1
73°
58°
2
73°
57°
3
74°
58°
4
74°
56°
5
72°
57°
6
71°
62°
7
71°
57°
8
72°
56°
9
73°
56°
10
72°
55°
11
71°
55°
12
70°
56°
13
72°
57°
14
71°
56°
15
74°
60°
16
77°
58°
17
78°
59°
18
77°
54°
19
70°
56°
20
76°
58°
21
67°
49°
22
67°
49°
23
Hist. Avg.
71°
52°
24
Hist. Avg.
71°
52°
25
Hist. Avg.
70°
51°
26
Hist. Avg.
70°
51°
27
Hist. Avg.
70°
50°
28
Hist. Avg.
69°
50°
29
Hist. Avg.
69°
50°
30
Hist. Avg.
68°
49°
1
Hist. Avg.
68°
49°
2
Hist. Avg.
67°
48°
3
Hist. Avg.
67°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Long Beach
Long Beach's September 2026 forecast shows daily high temperatures ranging from 67° to 79°, with overnight lows between 49° and 62°. The average high for September is 73° with an average low of 56°. 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.
