S
M
T
W
T
F
S
29
46°
30°
30
48°
33°
1
50°
32°
2
48°
32°
3
50°
31°
4
48°
29°
5
48°
29°
6
45°
30°
7
48°
29°
8
42°
27°
9
39°
28°
10
40°
25°
11
39°
27°
12
40°
25°
13
39°
22°
14
41°
16°
15
36°
17°
16
33°
20°
17
35°
18°
18
34°
25°
19
39°
24°
20
42°
22°
21
38°
18°
22
35°
18°
23
34°
13°
24
35°
21°
25
34°
15°
26
39°
10°
27
32°
11°
28
28°
11°
29
31°
9°
30
29°
13°
31
31°
22°
1
43°
18°
2
42°
12°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Pepperell
Pepperell's December 2026 forecast shows daily high temperatures ranging from 28° to 50°, with overnight lows between 9° and 33°. The average high for December is 39° 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 Pepperell. See also: January | February | March.