S
M
T
W
T
F
S
30
88°
76°
31
90°
78°
1
89°
76°
2
92°
74°
3
93°
74°
4
90°
76°
5
89°
75°
6
92°
76°
7
94°
77°
8
93°
75°
9
92°
74°
10
91°
73°
11
90°
75°
12
89°
73°
13
90°
72°
14
91°
74°
15
85°
74°
16
84°
73°
17
84°
73°
18
85°
72°
19
82°
74°
20
82°
73°
21
83°
73°
22
83°
72°
23
85°
72°
24
84°
71°
25
87°
72°
26
87°
72°
27
88°
71°
28
88°
71°
29
87°
70°
30
87°
71°
1
83°
71°
2
82°
70°
3
84°
70°
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 82° to 94°, with overnight lows between 70° and 77°. The average high for September is 87° with an average low of 73°. 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.
