S
M
T
W
T
F
S
30
70°
52°
31
70°
53°
1
69°
51°
2
66°
54°
3
66°
51°
4
63°
51°
5
63°
52°
6
68°
53°
7
68°
54°
8
65°
51°
9
66°
54°
10
68°
53°
11
67°
53°
12
65°
51°
13
65°
52°
14
66°
52°
15
69°
51°
16
64°
54°
17
64°
53°
18
63°
51°
19
63°
52°
20
64°
54°
21
63°
54°
22
63°
53°
23
62°
48°
24
61°
47°
25
61°
46°
26
63°
50°
27
69°
54°
28
69°
54°
29
68°
53°
30
67°
52°
1
68°
53°
2
68°
53°
3
67°
52°
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 61° to 69°, with overnight lows between 46° and 54°. The average high for September is 65° with an average low of 52°. 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.
