S
M
T
W
T
F
S
30
77°
61°
31
76°
62°
1
76°
61°
2
75°
63°
3
75°
63°
4
76°
62°
5
75°
62°
6
74°
61°
7
74°
62°
8
73°
61°
9
74°
61°
10
74°
60°
11
75°
60°
12
75°
61°
13
74°
61°
14
75°
60°
15
73°
61°
16
74°
59°
17
73°
59°
18
71°
58°
19
71°
52°
20
66°
51°
21
65°
58°
22
67°
51°
23
67°
51°
24
64°
52°
25
65°
56°
26
68°
55°
27
66°
54°
28
64°
53°
29
63°
51°
30
64°
50°
1
65°
55°
2
67°
57°
3
67°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Nantucket Town
Nantucket Town's September 2026 forecast shows daily high temperatures ranging from 63° to 77°, with overnight lows between 50° and 63°. The average high for September is 71° with an average low of 58°. 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 Nantucket Town. See also: October | November | December.
