S
M
T
W
T
F
S
30
79°
49°
31
N/A
1
70°
62°
2
73°
64°
3
74°
65°
4
79°
61°
5
72°
60°
6
72°
63°
7
74°
65°
8
76°
64°
9
76°
67°
10
77°
66°
11
76°
65°
12
77°
65°
13
76°
63°
14
75°
59°
15
72°
62°
16
72°
63°
17
75°
62°
18
70°
58°
19
70°
61°
20
71°
61°
21
74°
62°
22
76°
63°
23
77°
62°
24
76°
61°
25
75°
60°
26
74°
60°
27
75°
61°
28
75°
60°
29
74°
58°
30
68°
55°
1
65°
56°
2
65°
58°
3
72°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Edgartown
Edgartown's September 2026 forecast shows daily high temperatures ranging from 65° to 79°, with overnight lows between 55° and 67°. The average high for September is 73° with an average low of 62°. 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 Edgartown. See also: October | November | December.
