S
M
T
W
T
F
S
30
83°
69°
31
78°
65°
1
76°
63°
2
77°
63°
3
76°
65°
4
77°
64°
5
82°
63°
6
74°
64°
7
86°
71°
8
93°
71°
9
99°
74°
10
91°
75°
11
84°
73°
12
82°
69°
13
77°
68°
14
79°
66°
15
79°
69°
16
77°
68°
17
76°
66°
18
76°
63°
19
76°
68°
20
76°
68°
21
76°
68°
22
76°
68°
23
77°
68°
24
71°
64°
25
73°
65°
26
72°
64°
27
74°
65°
28
73°
63°
29
72°
65°
30
70°
63°
1
71°
64°
2
68°
61°
3
68°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Santa Monica
Santa Monica's September 2026 forecast shows daily high temperatures ranging from 68° to 77°, with overnight lows between 61° and 68°. The average high for September is 73° with an average low of 65°. 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 Santa Monica. See also: October | November | December.
