S
M
T
W
T
F
S
30
57°
43°
31
54°
42°
1
54°
39°
2
62°
38°
3
62°
51°
4
64°
54°
5
66°
48°
6
58°
50°
7
59°
53°
8
N/A
9
56°
45°
10
57°
44°
11
55°
50°
12
59°
42°
13
58°
43°
14
63°
49°
15
62°
47°
16
59°
45°
17
58°
44°
18
60°
46°
19
57°
45°
20
58°
46°
21
57°
45°
22
54°
39°
23
55°
40°
24
56°
38°
25
48°
36°
26
48°
34°
27
46°
34°
28
46°
33°
29
47°
33°
30
45°
34°
1
45°
32°
2
46°
33°
3
46°
34°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Port Alsworth
Port Alsworth's September 2026 forecast shows daily high temperatures ranging from 45° to 63°, with overnight lows between 32° and 50°. The average high for September is 54° with an average low of 40°. 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 Alsworth. See also: October | November | December.
