S
M
T
W
T
F
S
30
77°
58°
31
76°
57°
1
76°
55°
2
75°
51°
3
76°
49°
4
76°
50°
5
74°
49°
6
65°
47°
7
65°
51°
8
64°
56°
9
64°
55°
10
65°
51°
11
64°
46°
12
63°
50°
13
63°
53°
14
64°
50°
15
63°
48°
16
62°
47°
17
64°
49°
18
68°
54°
19
71°
50°
20
71°
48°
21
66°
45°
22
61°
44°
23
61°
47°
24
62°
46°
25
59°
45°
26
60°
46°
27
60°
48°
28
61°
47°
29
59°
47°
30
59°
46°
1
60°
50°
2
62°
53°
3
66°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Port Townsend
Port Townsend's September 2026 forecast shows daily high temperatures ranging from 59° to 77°, with overnight lows between 44° and 58°. The average high for September is 66° with an average low of 50°. 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 Port Townsend. See also: October | November | December.
