S
M
T
W
T
F
S
30
74°
56°
31
74°
55°
1
73°
56°
2
73°
58°
3
74°
57°
4
74°
55°
5
73°
53°
6
70°
51°
7
67°
53°
8
69°
54°
9
72°
55°
10
73°
57°
11
74°
56°
12
73°
53°
13
73°
53°
14
72°
55°
15
71°
52°
16
68°
50°
17
70°
51°
18
73°
55°
19
74°
56°
20
74°
53°
21
71°
54°
22
68°
55°
23
67°
52°
24
69°
54°
25
69°
51°
26
70°
50°
27
68°
50°
28
67°
48°
29
68°
49°
30
68°
51°
1
67°
57°
2
73°
56°
3
75°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in New Monterey
New Monterey's September 2026 forecast shows daily high temperatures ranging from 67° to 75°, with overnight lows between 48° and 58°. The average high for September is 71° with an average low of 54°. 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 New Monterey. See also: October | November | December.
