S
M
T
W
T
F
S
30
56°
49°
31
59°
49°
1
59°
48°
2
58°
47°
3
56°
48°
4
57°
47°
5
58°
48°
6
57°
48°
7
57°
47°
8
56°
48°
9
58°
48°
10
57°
47°
11
57°
47°
12
56°
42°
13
56°
47°
14
55°
47°
15
56°
46°
16
56°
45°
17
55°
45°
18
54°
44°
19
53°
45°
20
54°
46°
21
55°
44°
22
54°
43°
23
53°
42°
24
52°
43°
25
52°
45°
26
49°
42°
27
49°
41°
28
Hist. Avg.
51°
42°
29
Hist. Avg.
51°
42°
30
Hist. Avg.
51°
42°
1
Hist. Avg.
51°
42°
2
Hist. Avg.
50°
42°
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 Unalaska
Unalaska's September 2026 forecast shows daily high temperatures ranging from 49° to 59°, with overnight lows between 41° and 49°. The average high for September is 55° with an average low of 46°. 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 Unalaska. See also: October | November | December.
