S
M
T
W
T
F
S
30
81°
50°
31
72°
50°
1
72°
57°
2
73°
56°
3
74°
50°
4
76°
58°
5
80°
52°
6
79°
49°
7
71°
48°
8
70°
46°
9
70°
48°
10
74°
52°
11
74°
47°
12
69°
46°
13
68°
45°
14
72°
53°
15
74°
51°
16
75°
44°
17
70°
42°
18
66°
42°
19
66°
44°
20
67°
48°
21
64°
49°
22
64°
44°
23
65°
48°
24
65°
43°
25
68°
51°
26
71°
51°
27
71°
41°
28
68°
41°
29
63°
48°
30
66°
50°
1
62°
49°
2
63°
46°
3
61°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Alaska
Alaska's September 2026 forecast shows daily high temperatures ranging from 61° to 81°, with overnight lows between 40° and 58°. The average high for September is 70° with an average low of 48°. 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 Alaska. See also: October | November | December.
