S
M
T
W
T
F
S
29
55°
45°
30
65°
45°
1
63°
46°
2
63°
44°
3
61°
39°
4
51°
34°
5
59°
39°
6
60°
42°
7
56°
38°
8
49°
36°
9
49°
35°
10
47°
31°
11
47°
30°
12
48°
29°
13
49°
30°
14
48°
27°
15
48°
31°
16
49°
37°
17
51°
38°
18
55°
40°
19
57°
30°
20
54°
24°
21
49°
25°
22
44°
27°
23
47°
32°
24
47°
26°
25
48°
25°
26
44°
25°
27
46°
24°
28
45°
25°
29
45°
28°
30
47°
35°
31
58°
27°
1
59°
23°
2
45°
20°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Lowell
Lowell's December 2026 forecast shows daily high temperatures ranging from 44° to 65°, with overnight lows between 20° and 46°. The average high for December is 52° with an average low of 32°. 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 Lowell. See also: January | February | March.
