S
M
T
W
T
F
S
29
46°
34°
30
47°
36°
1
56°
32°
2
52°
35°
3
48°
32°
4
58°
28°
5
56°
28°
6
41°
29°
7
43°
29°
8
44°
27°
9
44°
25°
10
42°
25°
11
38°
26°
12
39°
27°
13
40°
27°
14
40°
28°
15
39°
29°
16
40°
30°
17
41°
28°
18
40°
36°
19
43°
34°
20
45°
30°
21
44°
28°
22
39°
26°
23
39°
25°
24
38°
29°
25
38°
27°
26
39°
28°
27
37°
29°
28
38°
27°
29
36°
23°
30
38°
23°
31
40°
19°
1
Hist. Avg.
41°
27°
2
Hist. Avg.
41°
27°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Hackensack
Hackensack's December 2026 forecast shows daily high temperatures ranging from 36° to 58°, with overnight lows between 19° and 36°. The average high for December is 43° with an average low of 28°. 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 Hackensack. See also: January | February | March.
