S
M
T
W
T
F
S
29
42°
30°
30
44°
32°
1
46°
31°
2
44°
32°
3
46°
30°
4
44°
29°
5
44°
28°
6
41°
29°
7
44°
28°
8
38°
26°
9
35°
27°
10
36°
24°
11
35°
26°
12
35°
24°
13
36°
20°
14
37°
15°
15
32°
16°
16
29°
19°
17
31°
17°
18
30°
24°
19
35°
23°
20
38°
21°
21
34°
17°
22
31°
17°
23
30°
12°
24
31°
20°
25
30°
15°
26
35°
9°
27
28°
10°
28
24°
10°
29
28°
9°
30
26°
13°
31
27°
22°
1
39°
17°
2
38°
11°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Ashburnham
Ashburnham's December 2026 forecast shows daily high temperatures ranging from 24° to 46°, with overnight lows between 9° and 32°. The average high for December is 36° with an average low of 21°. 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 Ashburnham. See also: January | February | March.
