S
M
T
W
T
F
S
30
75°
64°
31
74°
63°
1
76°
62°
2
69°
60°
3
69°
61°
4
70°
60°
5
68°
59°
6
69°
63°
7
72°
62°
8
69°
62°
9
68°
61°
10
70°
62°
11
74°
62°
12
73°
61°
13
74°
62°
14
74°
53°
15
68°
53°
16
65°
53°
17
66°
52°
18
65°
51°
19
64°
53°
20
65°
56°
21
71°
57°
22
70°
58°
23
72°
52°
24
72°
50°
25
66°
50°
26
63°
53°
27
68°
56°
28
69°
56°
29
70°
51°
30
69°
50°
1
63°
50°
2
63°
49°
3
66°
53°
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 63° to 76°, with overnight lows between 49° and 64°. The average high for September is 69° with an average low of 57°. 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.
