S
M
T
W
T
F
S
29
39°
30°
30
38°
30°
1
37°
31°
2
36°
30°
3
38°
30°
4
38°
33°
5
39°
32°
6
38°
31°
7
39°
30°
8
39°
31°
9
41°
30°
10
41°
29°
11
36°
31°
12
37°
34°
13
41°
34°
14
41°
33°
15
40°
33°
16
41°
34°
17
42°
33°
18
42°
33°
19
41°
26°
20
41°
33°
21
40°
33°
22
41°
32°
23
42°
33°
24
42°
33°
25
40°
32°
26
40°
31°
27
41°
32°
28
39°
30°
29
40°
29°
30
38°
29°
31
36°
30°
1
39°
30°
2
38°
29°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Unalaska
Unalaska's December 2026 forecast shows daily high temperatures ranging from 36° to 42°, with overnight lows between 26° and 34°. The average high for December is 39° with an average low of 31°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how December weather will actually feel in Unalaska. See also: January | February | March.
