S
M
T
W
T
F
S
30
88°
56°
31
79°
55°
1
79°
57°
2
82°
62°
3
78°
55°
4
78°
63°
5
83°
61°
6
85°
55°
7
81°
54°
8
78°
53°
9
76°
53°
10
76°
59°
11
79°
52°
12
76°
51°
13
75°
52°
14
77°
59°
15
80°
58°
16
79°
50°
17
81°
49°
18
72°
48°
19
71°
50°
20
71°
50°
21
72°
51°
22
69°
49°
23
70°
54°
24
73°
55°
25
74°
54°
26
76°
55°
27
76°
51°
28
75°
46°
29
68°
46°
30
68°
53°
1
67°
55°
2
71°
53°
3
73°
52°
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 67° to 88°, with overnight lows between 46° and 63°. The average high for September is 76° 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 Brunswick. See also: October | November | December.
