S
M
T
W
T
F
S
29
48°
33°
30
51°
36°
1
53°
35°
2
52°
35°
3
54°
34°
4
48°
31°
5
51°
29°
6
50°
33°
7
51°
31°
8
43°
27°
9
41°
26°
10
40°
25°
11
38°
31°
12
41°
28°
13
42°
26°
14
39°
23°
15
41°
24°
16
40°
27°
17
42°
28°
18
41°
30°
19
48°
28°
20
45°
18°
21
39°
20°
22
36°
22°
23
34°
25°
24
38°
24°
25
44°
22°
26
45°
17°
27
36°
14°
28
33°
16°
29
35°
12°
30
35°
27°
31
41°
25°
1
49°
18°
2
43°
17°
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 33° to 54°, with overnight lows between 12° and 36°. The average high for December is 43° with an average low of 26°. 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.
