S
M
T
W
T
F
S
30
70°
57°
31
75°
54°
1
72°
52°
2
74°
49°
3
71°
48°
4
73°
50°
5
75°
55°
6
73°
56°
7
72°
54°
8
70°
54°
9
74°
53°
10
77°
53°
11
76°
55°
12
75°
53°
13
74°
55°
14
76°
54°
15
74°
46°
16
68°
44°
17
64°
50°
18
65°
54°
19
74°
53°
20
72°
52°
21
73°
43°
22
71°
40°
23
70°
43°
24
69°
47°
25
Hist. Avg.
65°
44°
26
Hist. Avg.
64°
44°
27
Hist. Avg.
64°
44°
28
Hist. Avg.
63°
44°
29
Hist. Avg.
63°
43°
30
Hist. Avg.
62°
43°
1
Hist. Avg.
62°
43°
2
Hist. Avg.
62°
42°
3
Hist. Avg.
61°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Montague
Montague's September 2026 forecast shows daily high temperatures ranging from 64° to 77°, with overnight lows between 40° and 57°. The average high for September is 72° with an average low of 51°. 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 Montague. See also: October | November | December.