S
M
T
W
T
F
S
30
75°
56°
31
74°
55°
1
75°
58°
2
75°
62°
3
76°
64°
4
83°
64°
5
84°
63°
6
83°
56°
7
81°
55°
8
75°
56°
9
74°
55°
10
73°
57°
11
73°
58°
12
72°
56°
13
76°
56°
14
76°
60°
15
75°
58°
16
72°
59°
17
74°
58°
18
76°
57°
19
77°
52°
20
74°
55°
21
73°
52°
22
77°
50°
23
70°
50°
24
69°
51°
25
69°
52°
26
70°
49°
27
69°
49°
28
68°
52°
29
67°
47°
30
68°
47°
1
66°
51°
2
73°
49°
3
72°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Duxbury
Duxbury's September 2026 forecast shows daily high temperatures ranging from 66° to 84°, with overnight lows between 47° and 64°. The average high for September is 74° with an average low of 55°. 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 Duxbury. See also: October | November | December.