S
M
T
W
T
F
S
29
47°
33°
30
48°
37°
1
51°
36°
2
50°
36°
3
51°
34°
4
47°
33°
5
49°
31°
6
48°
34°
7
49°
33°
8
42°
29°
9
39°
28°
10
39°
26°
11
37°
32°
12
39°
28°
13
40°
28°
14
38°
23°
15
37°
23°
16
39°
24°
17
38°
25°
18
37°
29°
19
43°
28°
20
44°
20°
21
37°
21°
22
34°
22°
23
33°
22°
24
37°
21°
25
37°
21°
26
41°
14°
27
34°
12°
28
29°
14°
29
32°
9°
30
32°
20°
31
34°
25°
1
45°
17°
2
42°
14°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Cottekill
Cottekill's December 2026 forecast shows daily high temperatures ranging from 29° to 51°, with overnight lows between 9° and 37°. The average high for December is 41° with an average low of 25°. 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 Cottekill. See also: January | February | March.