S
M
T
W
T
F
S
29
48°
29°
30
50°
38°
1
51°
42°
2
50°
43°
3
50°
43°
4
54°
44°
5
53°
43°
6
54°
42°
7
56°
38°
8
47°
33°
9
46°
32°
10
46°
35°
11
62°
33°
12
64°
28°
13
63°
26°
14
45°
27°
15
46°
26°
16
47°
27°
17
45°
36°
18
50°
41°
19
58°
41°
20
60°
40°
21
60°
39°
22
58°
43°
23
60°
38°
24
62°
26°
25
61°
23°
26
42°
25°
27
43°
29°
28
50°
39°
29
54°
40°
30
56°
42°
31
59°
43°
1
60°
35°
2
61°
26°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Somerville
Somerville's December 2026 forecast shows daily high temperatures ranging from 42° to 64°, with overnight lows between 23° and 44°. The average high for December is 53° with an average low of 35°. 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 Somerville. See also: January | February | March.
