S
M
T
W
T
F
S
29
51°
41°
30
55°
44°
1
56°
43°
2
54°
43°
3
56°
42°
4
52°
40°
5
54°
39°
6
52°
41°
7
54°
40°
8
47°
37°
9
45°
34°
10
44°
32°
11
42°
37°
12
44°
36°
13
45°
33°
14
43°
30°
15
42°
30°
16
41°
31°
17
42°
32°
18
41°
36°
19
50°
35°
20
50°
27°
21
43°
28°
22
39°
28°
23
38°
29°
24
41°
30°
25
44°
28°
26
49°
22°
27
39°
22°
28
34°
23°
29
37°
23°
30
37°
30°
31
40°
31°
1
51°
24°
2
47°
21°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Centereach
Centereach's December 2026 forecast shows daily high temperatures ranging from 34° to 56°, with overnight lows between 21° and 44°. The average high for December is 46° with an average low of 33°. 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 Centereach. See also: January | February | March.
