S
M
T
W
T
F
S
30
59°
36°
31
58°
43°
1
58°
33°
2
60°
45°
3
57°
51°
4
58°
55°
5
61°
51°
6
61°
53°
7
61°
47°
8
58°
47°
9
57°
44°
10
58°
45°
11
58°
43°
12
55°
44°
13
54°
44°
14
56°
43°
15
56°
39°
16
55°
40°
17
50°
42°
18
51°
43°
19
51°
42°
20
53°
42°
21
51°
39°
22
50°
35°
23
50°
33°
24
51°
37°
25
50°
40°
26
48°
41°
27
51°
41°
28
54°
40°
29
52°
39°
30
51°
39°
1
50°
40°
2
52°
39°
3
51°
38°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Port Nikiski
Port Nikiski's September 2026 forecast shows daily high temperatures ranging from 48° to 61°, with overnight lows between 33° and 55°. The average high for September is 54° with an average low of 43°. 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 Nikiski. See also: October | November | December.
