S
M
T
W
T
F
S
30
84°
72°
31
83°
68°
1
84°
65°
2
82°
64°
3
78°
65°
4
78°
64°
5
89°
65°
6
78°
66°
7
92°
73°
8
96°
74°
9
107°
76°
10
83°
72°
11
83°
71°
12
81°
69°
13
79°
68°
14
79°
69°
15
82°
66°
16
81°
67°
17
84°
67°
18
87°
68°
19
87°
69°
20
83°
66°
21
82°
66°
22
83°
67°
23
81°
64°
24
76°
63°
25
76°
62°
26
82°
64°
27
83°
65°
28
79°
61°
29
82°
63°
30
82°
66°
1
83°
66°
2
83°
65°
3
82°
66°
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 76° to 87°, with overnight lows between 61° and 72°. The average high for September is 82° with an average low of 66°. 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.
