S
M
T
W
T
F
S
30
80°
51°
31
72°
50°
1
71°
51°
2
71°
56°
3
72°
51°
4
73°
58°
5
77°
57°
6
78°
50°
7
75°
50°
8
70°
49°
9
70°
48°
10
69°
55°
11
72°
48°
12
73°
48°
13
67°
47°
14
68°
54°
15
72°
55°
16
75°
45°
17
75°
44°
18
66°
44°
19
64°
46°
20
65°
46°
21
65°
47°
22
63°
45°
23
63°
49°
24
64°
49°
25
64°
48°
26
70°
51°
27
69°
44°
28
70°
42°
29
62°
42°
30
61°
48°
1
62°
49°
2
66°
47°
3
67°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Montvale
Montvale's September 2026 forecast shows daily high temperatures ranging from 61° to 80°, with overnight lows between 42° and 58°. The average high for September is 69° with an average low of 49°. 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 Montvale. See also: October | November | December.
