S
M
T
W
T
F
S
30
84°
70°
31
82°
65°
1
82°
63°
2
81°
65°
3
80°
65°
4
80°
67°
5
83°
71°
6
83°
71°
7
81°
67°
8
82°
66°
9
82°
65°
10
79°
63°
11
77°
64°
12
76°
63°
13
76°
64°
14
79°
63°
15
78°
61°
16
81°
65°
17
80°
64°
18
74°
59°
19
75°
60°
20
78°
62°
21
80°
64°
22
78°
64°
23
77°
63°
24
76°
61°
25
77°
63°
26
80°
64°
27
80°
65°
28
79°
64°
29
80°
63°
30
79°
64°
1
80°
63°
2
79°
63°
3
77°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Lomita
Lomita's September 2026 forecast shows daily high temperatures ranging from 74° to 83°, with overnight lows between 59° and 71°. The average high for September is 79° 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 Lomita. See also: October | November | December.