S
M
T
W
T
F
S
29
64°
38°
30
63°
36°
1
66°
38°
2
68°
37°
3
66°
38°
4
69°
40°
5
71°
41°
6
67°
37°
7
64°
40°
8
64°
32°
9
58°
34°
10
61°
36°
11
66°
37°
12
69°
40°
13
69°
42°
14
68°
38°
15
60°
37°
16
61°
36°
17
63°
34°
18
65°
36°
19
66°
35°
20
67°
42°
21
64°
32°
22
59°
33°
23
58°
35°
24
63°
34°
25
63°
34°
26
62°
43°
27
59°
34°
28
69°
37°
29
69°
32°
30
Hist. Avg.
64°
42°
31
Hist. Avg.
64°
42°
1
Hist. Avg.
64°
42°
2
Hist. Avg.
64°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Morristown
Morristown's December 2026 forecast shows daily high temperatures ranging from 58° to 71°, with overnight lows between 32° and 43°. The average high for December is 65° with an average low of 37°. 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 Morristown. See also: January | February | March.
