S
M
T
W
T
F
S
30
63°
52°
31
64°
56°
1
71°
57°
2
73°
53°
3
72°
52°
4
69°
57°
5
69°
54°
6
67°
54°
7
71°
51°
8
70°
51°
9
83°
60°
10
74°
62°
11
62°
57°
12
69°
54°
13
68°
55°
14
67°
51°
15
64°
55°
16
66°
59°
17
69°
53°
18
64°
58°
19
66°
58°
20
65°
58°
21
64°
57°
22
65°
56°
23
75°
55°
24
78°
56°
25
74°
56°
26
73°
55°
27
74°
55°
28
74°
54°
29
72°
53°
30
71°
54°
1
73°
53°
2
68°
56°
3
74°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Seaside-Monterey
Seaside-Monterey's September 2026 forecast shows daily high temperatures ranging from 64° to 78°, with overnight lows between 53° and 58°. The average high for September is 71° with an average low of 55°. 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 Seaside-Monterey. See also: October | November | December.
