S
M
T
W
T
F
S
30
70°
52°
31
70°
53°
1
69°
51°
2
70°
55°
3
70°
55°
4
70°
45°
5
72°
46°
6
75°
48°
7
70°
52°
8
73°
50°
9
77°
45°
10
72°
54°
11
68°
54°
12
N/A
13
63°
54°
14
64°
54°
15
63°
51°
16
66°
52°
17
66°
51°
18
71°
53°
19
70°
52°
20
67°
53°
21
63°
52°
22
64°
51°
23
63°
51°
24
62°
50°
25
63°
51°
26
65°
50°
27
62°
50°
28
61°
50°
29
60°
50°
30
60°
48°
1
59°
48°
2
59°
49°
3
58°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Port Townsend
Port Townsend's September 2026 forecast shows daily high temperatures ranging from 58° to 71°, with overnight lows between 45° and 54°. The average high for September is 63° with an average low of 51°. 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.
