S
M
T
W
T
F
S
30
85°
67°
31
87°
67°
1
88°
66°
2
88°
66°
3
87°
65°
4
88°
67°
5
86°
66°
6
86°
64°
7
85°
59°
8
78°
61°
9
77°
64°
10
76°
65°
11
84°
64°
12
83°
65°
13
85°
64°
14
84°
58°
15
83°
61°
16
73°
55°
17
75°
53°
18
74°
56°
19
76°
51°
20
73°
51°
21
72°
52°
22
73°
58°
23
77°
58°
24
80°
60°
25
80°
60°
26
81°
58°
27
80°
59°
28
78°
54°
29
77°
55°
30
77°
53°
1
75°
54°
2
78°
56°
3
70°
46°
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 70° to 88°, with overnight lows between 46° and 67°. The average high for September is 80° with an average low of 59°. 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.
