S
M
T
W
T
F
S
30
69°
56°
31
71°
56°
1
69°
55°
2
69°
56°
3
72°
55°
4
68°
56°
5
68°
56°
6
69°
53°
7
72°
57°
8
73°
57°
9
73°
58°
10
74°
58°
11
74°
57°
12
73°
57°
13
69°
56°
14
67°
55°
15
68°
53°
16
71°
57°
17
74°
58°
18
75°
57°
19
74°
56°
20
74°
57°
21
75°
57°
22
74°
56°
23
73°
56°
24
71°
54°
25
74°
56°
26
74°
57°
27
75°
57°
28
74°
56°
29
73°
52°
30
74°
56°
1
72°
53°
2
67°
49°
3
68°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Monterey
Monterey's September 2026 forecast shows daily high temperatures ranging from 67° to 75°, with overnight lows between 49° and 58°. The average high for September is 72° with an average low of 56°. 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 Monterey. See also: October | November | December.
