S
M
T
W
T
F
S
30
81°
63°
31
82°
62°
1
81°
61°
2
80°
62°
3
80°
62°
4
81°
63°
5
80°
63°
6
80°
64°
7
81°
64°
8
80°
63°
9
79°
65°
10
80°
65°
11
82°
64°
12
84°
64°
13
83°
66°
14
84°
68°
15
85°
68°
16
85°
67°
17
84°
67°
18
86°
65°
19
85°
66°
20
84°
68°
21
84°
68°
22
86°
67°
23
86°
67°
24
84°
65°
25
77°
60°
26
75°
61°
27
76°
64°
28
77°
65°
29
80°
62°
30
77°
62°
1
74°
61°
2
75°
63°
3
82°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Los Alamitos
Los Alamitos's September 2026 forecast shows daily high temperatures ranging from 74° to 86°, with overnight lows between 60° and 68°. The average high for September is 81° with an average low of 64°. 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 Los Alamitos. See also: October | November | December.
