S
M
T
W
T
F
S
29
47°
34°
30
53°
31°
1
53°
24°
2
50°
22°
3
40°
21°
4
39°
28°
5
44°
26°
6
44°
22°
7
40°
28°
8
46°
23°
9
47°
22°
10
39°
17°
11
36°
14°
12
34°
13°
13
32°
18°
14
35°
12°
15
34°
12°
16
30°
13°
17
32°
18°
18
41°
14°
19
39°
16°
20
32°
20°
21
36°
22°
22
37°
18°
23
35°
18°
24
33°
23°
25
43°
22°
26
45°
20°
27
32°
15°
28
29°
17°
29
Hist. Avg.
36°
17°
30
Hist. Avg.
36°
17°
31
Hist. Avg.
36°
17°
1
Hist. Avg.
36°
16°
2
Hist. Avg.
36°
16°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Nashua
Nashua's December 2026 forecast shows daily high temperatures ranging from 29° to 53°, with overnight lows between 12° and 34°. The average high for December is 39° with an average low of 20°. 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 Nashua. See also: January | February | March.
