S
M
T
W
T
F
S
30
76°
58°
31
80°
57°
1
82°
58°
2
83°
60°
3
84°
60°
4
81°
57°
5
81°
52°
6
79°
59°
7
80°
56°
8
82°
59°
9
84°
58°
10
83°
59°
11
84°
59°
12
83°
58°
13
84°
57°
14
83°
57°
15
82°
58°
16
81°
58°
17
77°
55°
18
77°
50°
19
74°
47°
20
72°
50°
21
71°
49°
22
74°
45°
23
70°
45°
24
70°
54°
25
71°
54°
26
73°
53°
27
70°
54°
28
70°
54°
29
71°
53°
30
70°
44°
1
68°
41°
2
67°
40°
3
64°
39°
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 64° to 84°, with overnight lows between 39° and 60°. The average high for September is 77° with an average low of 53°. 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.
