S
M
T
W
T
F
S
29
40°
27°
30
44°
23°
1
42°
19°
2
39°
21°
3
38°
19°
4
40°
17°
5
35°
21°
6
38°
31°
7
43°
34°
8
49°
32°
9
52°
29°
10
49°
28°
11
43°
27°
12
41°
25°
13
42°
25°
14
37°
28°
15
38°
26°
16
41°
27°
17
38°
20°
18
37°
18°
19
34°
17°
20
36°
29°
21
41°
27°
22
44°
17°
23
41°
21°
24
34°
29°
25
44°
24°
26
44°
15°
27
40°
19°
28
32°
13°
29
38°
14°
30
30°
13°
31
44°
14°
1
40°
15°
2
35°
20°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Billerica
Billerica's December 2026 forecast shows daily high temperatures ranging from 30° to 52°, with overnight lows between 13° and 34°. The average high for December is 40° with an average low of 22°. 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 Billerica. See also: January | February | March.
