S
M
T
W
T
F
S
30
83°
57°
31
87°
58°
1
89°
59°
2
88°
55°
3
89°
51°
4
82°
57°
5
87°
57°
6
89°
56°
7
88°
57°
8
89°
58°
9
89°
57°
10
88°
57°
11
86°
54°
12
84°
45°
13
76°
47°
14
76°
50°
15
81°
52°
16
81°
52°
17
78°
51°
18
81°
50°
19
73°
49°
20
70°
48°
21
73°
49°
22
72°
46°
23
70°
40°
24
68°
49°
25
74°
49°
26
77°
48°
27
78°
39°
28
69°
43°
29
74°
37°
30
77°
35°
1
67°
34°
2
65°
32°
3
64°
33°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Wellfleet
Wellfleet's September 2026 forecast shows daily high temperatures ranging from 64° to 89°, with overnight lows between 32° and 59°. The average high for September is 79° with an average low of 49°. 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 Wellfleet. See also: October | November | December.
