S
M
T
W
T
F
S
30
75°
52°
31
78°
51°
1
78°
57°
2
70°
59°
3
67°
59°
4
77°
62°
5
72°
53°
6
72°
53°
7
75°
55°
8
74°
54°
9
72°
53°
10
71°
54°
11
72°
55°
12
72°
54°
13
71°
53°
14
72°
51°
15
68°
54°
16
70°
55°
17
73°
55°
18
65°
52°
19
67°
48°
20
66°
53°
21
72°
55°
22
73°
54°
23
73°
53°
24
71°
52°
25
71°
51°
26
72°
53°
27
71°
52°
28
70°
51°
29
69°
48°
30
60°
45°
1
59°
42°
2
59°
50°
3
67°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Brunswick
Brunswick's September 2026 forecast shows daily high temperatures ranging from 59° to 78°, with overnight lows between 42° and 62°. The average high for September is 70° with an average low of 53°. 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 Brunswick. See also: October | November | December.
