S
M
T
W
T
F
S
30
80°
63°
31
73°
65°
1
71°
62°
2
75°
63°
3
77°
63°
4
75°
64°
5
70°
64°
6
67°
57°
7
75°
62°
8
74°
57°
9
78°
58°
10
84°
68°
11
73°
49°
12
75°
49°
13
69°
64°
14
71°
60°
15
66°
46°
16
73°
46°
17
79°
63°
18
73°
61°
19
63°
52°
20
65°
61°
21
63°
56°
22
62°
53°
23
63°
53°
24
61°
54°
25
61°
54°
26
65°
54°
27
63°
52°
28
63°
50°
29
62°
50°
30
64°
51°
1
65°
52°
2
64°
46°
3
61°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Provincetown
Provincetown's September 2026 forecast shows daily high temperatures ranging from 61° to 65°, with overnight lows between 46° and 61°. The average high for September is 63° with an average low of 53°. 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 Provincetown. See also: October | November | December.
