S
M
T
W
T
F
S
29
73°
48°
30
71°
42°
1
69°
34°
2
57°
33°
3
59°
34°
4
63°
45°
5
66°
39°
6
59°
33°
7
58°
35°
8
56°
32°
9
55°
31°
10
57°
32°
11
61°
33°
12
61°
36°
13
67°
42°
14
60°
33°
15
58°
32°
16
58°
37°
17
62°
32°
18
57°
29°
19
56°
27°
20
55°
30°
21
57°
33°
22
61°
30°
23
58°
28°
24
55°
29°
25
57°
29°
26
56°
30°
27
58°
34°
28
59°
30°
29
56°
28°
30
54°
29°
31
56°
27°
1
55°
28°
2
56°
38°
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 54° to 73°, with overnight lows between 27° and 48°. The average high for December is 59° with an average low of 33°. 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.
