S
M
T
W
T
F
S
30
75°
61°
31
74°
60°
1
76°
59°
2
69°
56°
3
68°
58°
4
68°
57°
5
69°
56°
6
69°
60°
7
72°
59°
8
68°
59°
9
68°
58°
10
70°
59°
11
74°
58°
12
73°
59°
13
74°
59°
14
74°
49°
15
68°
49°
16
65°
50°
17
66°
49°
18
65°
47°
19
64°
50°
20
65°
52°
21
71°
54°
22
71°
54°
23
72°
48°
24
72°
46°
25
66°
46°
26
64°
49°
27
68°
52°
28
69°
52°
29
70°
47°
30
69°
47°
1
63°
46°
2
63°
46°
3
66°
49°
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 63° to 76°, with overnight lows between 46° and 61°. The average high for September is 69° 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.
