S
M
T
W
T
F
S
30
59°
46°
31
56°
44°
1
58°
44°
2
58°
43°
3
59°
46°
4
60°
47°
5
59°
47°
6
60°
44°
7
61°
41°
8
58°
40°
9
59°
37°
10
61°
36°
11
50°
35°
12
49°
35°
13
49°
36°
14
50°
35°
15
47°
34°
16
47°
34°
17
46°
33°
18
45°
32°
19
45°
29°
20
44°
35°
21
46°
31°
22
47°
31°
23
45°
30°
24
43°
31°
25
43°
30°
26
42°
29°
27
40°
28°
28
40°
28°
29
39°
27°
30
39°
27°
1
38°
26°
2
36°
28°
3
39°
30°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Koyuk
Koyuk's September 2026 forecast shows daily high temperatures ranging from 36° to 61°, with overnight lows between 26° and 47°. The average high for September is 49° with an average low of 35°. 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 Koyuk. See also: October | November | December.
