S
M
T
W
T
F
S
29
35°
22°
30
34°
21°
1
34°
24°
2
35°
29°
3
37°
27°
4
41°
30°
5
39°
32°
6
39°
32°
7
42°
31°
8
38°
28°
9
33°
27°
10
32°
27°
11
42°
26°
12
37°
27°
13
35°
20°
14
34°
16°
15
32°
20°
16
29°
19°
17
29°
23°
18
34°
24°
19
33°
28°
20
35°
28°
21
37°
27°
22
39°
28°
23
39°
28°
24
43°
24°
25
40°
20°
26
36°
15°
27
28°
16°
28
29°
26°
29
36°
25°
30
37°
28°
31
39°
29°
1
40°
25°
2
41°
18°
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 28° to 43°, with overnight lows between 15° and 32°. The average high for December is 36° with an average low of 25°. 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.
