S
M
T
W
T
F
S
29
45°
39°
30
47°
41°
1
46°
43°
2
49°
42°
3
49°
42°
4
48°
41°
5
47°
40°
6
46°
38°
7
46°
33°
8
45°
31°
9
40°
30°
10
39°
30°
11
39°
32°
12
40°
33°
13
39°
35°
14
43°
36°
15
44°
39°
16
45°
40°
17
46°
39°
18
46°
39°
19
45°
38°
20
46°
38°
21
46°
37°
22
44°
37°
23
43°
36°
24
43°
36°
25
42°
35°
26
43°
31°
27
42°
30°
28
37°
30°
29
38°
29°
30
38°
30°
31
37°
35°
1
39°
36°
2
39°
34°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Keitum
Keitum's December 2026 forecast shows daily high temperatures ranging from 37° to 49°, with overnight lows between 29° and 43°. The average high for December is 43° with an average low of 36°. 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 Keitum. See also: January | February | March.