S
M
T
W
T
F
S
30
60°
48°
31
63°
51°
1
62°
52°
2
59°
51°
3
60°
51°
4
59°
49°
5
58°
47°
6
58°
46°
7
59°
46°
8
58°
47°
9
58°
47°
10
61°
49°
11
57°
49°
12
57°
48°
13
58°
46°
14
57°
47°
15
59°
49°
16
56°
50°
17
58°
50°
18
59°
51°
19
59°
49°
20
60°
50°
21
59°
48°
22
58°
47°
23
54°
48°
24
54°
47°
25
55°
44°
26
54°
44°
27
53°
43°
28
53°
44°
29
54°
43°
30
52°
41°
1
53°
47°
2
57°
47°
3
57°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Port Armstrong
Port Armstrong's September 2026 forecast shows daily high temperatures ranging from 52° to 63°, with overnight lows between 41° and 52°. The average high for September is 57° with an average low of 47°. 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 Armstrong. See also: October | November | December.
