S
M
T
W
T
F
S
29
46°
27°
30
43°
26°
1
42°
28°
2
42°
36°
3
51°
33°
4
55°
28°
5
46°
29°
6
41°
30°
7
46°
31°
8
49°
34°
9
47°
26°
10
49°
33°
11
49°
36°
12
Hist. Avg.
46°
32°
13
Hist. Avg.
46°
31°
14
Hist. Avg.
45°
31°
15
Hist. Avg.
45°
31°
16
Hist. Avg.
45°
31°
17
Hist. Avg.
44°
30°
18
Hist. Avg.
44°
30°
19
Hist. Avg.
44°
30°
20
Hist. Avg.
44°
30°
21
Hist. Avg.
43°
30°
22
Hist. Avg.
43°
29°
23
Hist. Avg.
43°
29°
24
Hist. Avg.
42°
29°
25
Hist. Avg.
42°
29°
26
Hist. Avg.
42°
28°
27
Hist. Avg.
42°
28°
28
Hist. Avg.
42°
28°
29
Hist. Avg.
41°
28°
30
Hist. Avg.
41°
28°
31
Hist. Avg.
41°
28°
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
*Temporarily Unavailable
December Weather in Closter
Closter's December 2026 forecast shows daily high temperatures ranging from 41° to 55°, with overnight lows between 26° and 36°. The average high for December is 47° with an average low of 31°. 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 Closter. See also: January | February | March.