S
M
T
W
T
F
S
30
87°
68°
31
88°
66°
1
92°
66°
2
93°
67°
3
95°
68°
4
92°
69°
5
93°
68°
6
91°
68°
7
84°
64°
8
83°
62°
9
84°
65°
10
82°
65°
11
79°
62°
12
81°
62°
13
81°
61°
14
82°
63°
15
81°
60°
16
77°
61°
17
80°
59°
18
78°
58°
19
77°
59°
20
68°
48°
21
82°
63°
22
79°
62°
23
80°
63°
24
80°
63°
25
79°
62°
26
80°
62°
27
81°
61°
28
80°
62°
29
80°
62°
30
79°
61°
1
79°
60°
2
76°
54°
3
67°
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 84°, with overnight lows between 48° and 65°. The average high for September is 79° with an average low of 60°. 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.
