S
M
T
W
T
F
S
30
78°
56°
31
76°
55°
1
77°
61°
2
77°
64°
3
78°
63°
4
85°
64°
5
84°
62°
6
82°
55°
7
79°
55°
8
77°
54°
9
76°
53°
10
74°
53°
11
75°
54°
12
74°
53°
13
78°
58°
14
79°
59°
15
78°
58°
16
74°
54°
17
73°
55°
18
74°
57°
19
75°
49°
20
74°
52°
21
73°
49°
22
77°
48°
23
71°
47°
24
70°
47°
25
70°
53°
26
71°
47°
27
70°
52°
28
70°
52°
29
68°
45°
30
68°
47°
1
67°
52°
2
73°
50°
3
71°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Lower Montville
Lower Montville's September 2026 forecast shows daily high temperatures ranging from 67° to 85°, with overnight lows between 45° and 64°. The average high for September is 75° 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 Lower Montville. See also: October | November | December.