S
M
T
W
T
F
S
30
56°
48°
31
55°
47°
1
56°
47°
2
56°
46°
3
55°
47°
4
55°
46°
5
54°
41°
6
56°
47°
7
56°
47°
8
55°
46°
9
55°
46°
10
54°
45°
11
54°
46°
12
53°
46°
13
54°
45°
14
55°
46°
15
54°
45°
16
54°
45°
17
53°
43°
18
54°
44°
19
52°
43°
20
51°
43°
21
50°
44°
22
51°
41°
23
Hist. Avg.
52°
43°
24
Hist. Avg.
52°
42°
25
Hist. Avg.
51°
42°
26
Hist. Avg.
51°
42°
27
Hist. Avg.
51°
42°
28
Hist. Avg.
51°
42°
29
Hist. Avg.
51°
42°
30
Hist. Avg.
51°
42°
1
Hist. Avg.
51°
41°
2
Hist. Avg.
50°
41°
3
Hist. Avg.
50°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Adak
Adak's September 2026 forecast shows daily high temperatures ranging from 50° to 56°, with overnight lows between 41° and 48°. The average high for September is 54° with an average low of 45°. 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 Adak. See also: October | November | December.