S
M
T
W
T
F
S
30
60°
36°
31
58°
35°
1
52°
35°
2
52°
34°
3
53°
33°
4
51°
34°
5
52°
34°
6
51°
36°
7
51°
33°
8
50°
34°
9
51°
37°
10
49°
40°
11
51°
41°
12
58°
41°
13
57°
42°
14
56°
40°
15
55°
39°
16
56°
41°
17
55°
40°
18
56°
40°
19
55°
37°
20
54°
34°
21
49°
29°
22
46°
28°
23
44°
22°
24
45°
25°
25
44°
24°
26
41°
23°
27
39°
23°
28
39°
24°
29
38°
22°
30
37°
22°
1
36°
21°
2
37°
26°
3
35°
29°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Koyukuk
Koyukuk's September 2026 forecast shows daily high temperatures ranging from 35° to 60°, with overnight lows between 21° and 42°. The average high for September is 49° with an average low of 32°. 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 Koyukuk. See also: October | November | December.
