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