S
M
T
W
T
F
S
30
81°
49°
31
72°
49°
1
74°
57°
2
77°
57°
3
71°
49°
4
71°
53°
5
72°
48°
6
72°
50°
7
73°
48°
8
71°
47°
9
70°
48°
10
71°
49°
11
71°
46°
12
68°
47°
13
69°
46°
14
71°
50°
15
73°
43°
16
66°
42°
17
64°
41°
18
64°
42°
19
65°
44°
20
64°
43°
21
65°
44°
22
69°
43°
23
70°
50°
24
71°
49°
25
71°
50°
26
70°
49°
27
71°
41°
28
66°
38°
29
60°
41°
30
61°
48°
1
63°
50°
2
66°
47°
3
67°
46°
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 60° to 81°, with overnight lows between 38° and 57°. The average high for September is 69° with an average low of 47°. 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.
