S
M
T
W
T
F
S
30
74°
53°
31
73°
52°
1
74°
53°
2
72°
51°
3
72°
50°
4
73°
53°
5
75°
56°
6
73°
56°
7
71°
51°
8
75°
50°
9
71°
52°
10
75°
58°
11
77°
56°
12
77°
57°
13
76°
51°
14
72°
52°
15
70°
47°
16
69°
47°
17
66°
56°
18
73°
53°
19
72°
52°
20
70°
46°
21
75°
45°
22
66°
43°
23
72°
51°
24
Hist. Avg.
70°
50°
25
Hist. Avg.
70°
50°
26
Hist. Avg.
69°
50°
27
Hist. Avg.
69°
49°
28
Hist. Avg.
68°
49°
29
Hist. Avg.
68°
49°
30
Hist. Avg.
68°
48°
1
Hist. Avg.
67°
48°
2
Hist. Avg.
67°
48°
3
Hist. Avg.
66°
47°
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 66° to 77°, with overnight lows between 43° and 58°. The average high for September is 73° with an average low of 52°. 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.