S
M
T
W
T
F
S
29
42°
26°
30
48°
22°
1
45°
21°
2
36°
24°
3
41°
25°
4
42°
25°
5
43°
29°
6
46°
30°
7
46°
33°
8
49°
30°
9
50°
28°
10
46°
28°
11
45°
22°
12
43°
22°
13
33°
19°
14
36°
20°
15
33°
16°
16
34°
14°
17
31°
14°
18
30°
15°
19
30°
14°
20
29°
17°
21
32°
22°
22
36°
26°
23
42°
21°
24
42°
16°
25
37°
8°
26
30°
8°
27
29°
19°
28
29°
11°
29
37°
8°
30
29°
7°
31
25°
11°
1
26°
18°
2
32°
9°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Great Barrington
Great Barrington's December 2026 forecast shows daily high temperatures ranging from 25° to 50°, with overnight lows between 7° and 33°. The average high for December is 37° with an average low of 19°. 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 Great Barrington. See also: January | February | March.
