S
M
T
W
T
F
S
30
85°
65°
31
82°
67°
1
85°
67°
2
86°
66°
3
85°
65°
4
83°
62°
5
81°
61°
6
80°
62°
7
79°
60°
8
78°
60°
9
78°
61°
10
79°
63°
11
80°
64°
12
82°
64°
13
84°
65°
14
83°
62°
15
80°
61°
16
79°
64°
17
79°
66°
18
83°
66°
19
82°
65°
20
84°
66°
21
84°
66°
22
79°
65°
23
79°
60°
24
78°
59°
25
78°
59°
26
76°
60°
27
76°
62°
28
78°
61°
29
78°
61°
30
83°
63°
1
83°
63°
2
Hist. Avg.
80°
62°
3
Hist. Avg.
79°
62°
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 86°, with overnight lows between 59° and 67°. The average high for September is 81° with an average low of 63°. 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.
