S
M
T
W
T
F
S
29
43°
31°
30
41°
30°
1
41°
29°
2
40°
29°
3
42°
31°
4
43°
33°
5
43°
32°
6
42°
35°
7
43°
36°
8
45°
35°
9
44°
29°
10
39°
30°
11
50°
32°
12
48°
32°
13
41°
31°
14
50°
30°
15
45°
26°
16
40°
23°
17
37°
29°
18
37°
30°
19
42°
30°
20
43°
31°
21
42°
32°
22
47°
31°
23
47°
32°
24
46°
35°
25
50°
25°
26
50°
23°
27
49°
21°
28
34°
24°
29
34°
29°
30
43°
29°
31
44°
30°
1
46°
32°
2
48°
29°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Braintree
Braintree's December 2026 forecast shows daily high temperatures ranging from 34° to 50°, with overnight lows between 21° and 36°. The average high for December is 43° with an average low of 30°. 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 Braintree. See also: January | February | March.