S
M
T
W
T
F
S
29
45°
35°
30
43°
33°
1
42°
33°
2
42°
34°
3
44°
35°
4
44°
37°
5
46°
37°
6
45°
38°
7
45°
38°
8
47°
37°
9
47°
33°
10
40°
32°
11
50°
32°
12
49°
34°
13
42°
34°
14
51°
32°
15
48°
28°
16
40°
25°
17
38°
30°
18
39°
33°
19
44°
32°
20
44°
33°
21
42°
33°
22
48°
32°
23
49°
33°
24
48°
36°
25
51°
25°
26
51°
24°
27
50°
23°
28
35°
25°
29
35°
30°
30
44°
30°
31
46°
31°
1
47°
33°
2
48°
30°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Barnstable
Barnstable's December 2026 forecast shows daily high temperatures ranging from 35° to 51°, with overnight lows between 23° and 38°. The average high for December is 45° with an average low of 32°. 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 Barnstable. See also: January | February | March.
