S
M
T
W
T
F
S
30
75°
58°
31
78°
58°
1
80°
59°
2
80°
58°
3
75°
56°
4
73°
53°
5
71°
48°
6
72°
46°
7
70°
54°
8
72°
55°
9
73°
57°
10
79°
53°
11
78°
47°
12
76°
47°
13
68°
48°
14
69°
55°
15
72°
55°
16
77°
53°
17
74°
52°
18
69°
53°
19
69°
52°
20
76°
45°
21
72°
42°
22
63°
43°
23
64°
42°
24
64°
47°
25
66°
51°
26
71°
46°
27
72°
41°
28
62°
40°
29
63°
41°
30
63°
45°
1
64°
41°
2
62°
42°
3
63°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Bangor
Bangor's September 2026 forecast shows daily high temperatures ranging from 62° to 80°, with overnight lows between 40° and 59°. The average high for September is 71° 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 Bangor. See also: October | November | December.
