S
M
T
W
T
F
S
30
70°
61°
31
71°
63°
1
76°
64°
2
76°
62°
3
75°
58°
4
75°
63°
5
74°
57°
6
74°
57°
7
69°
61°
8
67°
61°
9
68°
56°
10
74°
54°
11
68°
61°
12
70°
57°
13
74°
56°
14
68°
55°
15
67°
59°
16
70°
53°
17
Hist. Avg.
70°
58°
18
Hist. Avg.
70°
58°
19
Hist. Avg.
70°
58°
20
Hist. Avg.
69°
58°
21
Hist. Avg.
69°
57°
22
Hist. Avg.
69°
57°
23
Hist. Avg.
68°
57°
24
Hist. Avg.
68°
56°
25
Hist. Avg.
68°
56°
26
Hist. Avg.
67°
56°
27
Hist. Avg.
67°
55°
28
Hist. Avg.
67°
55°
29
Hist. Avg.
66°
55°
30
Hist. Avg.
66°
54°
1
Hist. Avg.
66°
54°
2
Hist. Avg.
66°
54°
3
Hist. Avg.
65°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Wellfleet
Wellfleet's September 2026 forecast shows daily high temperatures ranging from 67° to 76°, with overnight lows between 53° and 64°. The average high for September is 71° with an average low of 59°. 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.
