S
M
T
W
T
F
S
29
56°
35°
30
47°
33°
1
46°
36°
2
45°
40°
3
48°
35°
4
48°
31°
5
45°
31°
6
44°
30°
7
44°
29°
8
41°
27°
9
42°
26°
10
40°
25°
11
39°
32°
12
47°
30°
13
Hist. Avg.
45°
30°
14
Hist. Avg.
45°
30°
15
Hist. Avg.
44°
30°
16
Hist. Avg.
44°
30°
17
Hist. Avg.
44°
30°
18
Hist. Avg.
44°
29°
19
Hist. Avg.
44°
29°
20
Hist. Avg.
43°
29°
21
Hist. Avg.
43°
29°
22
Hist. Avg.
43°
28°
23
Hist. Avg.
43°
28°
24
Hist. Avg.
42°
28°
25
Hist. Avg.
42°
28°
26
Hist. Avg.
42°
28°
27
Hist. Avg.
42°
27°
28
Hist. Avg.
42°
27°
29
Hist. Avg.
41°
27°
30
Hist. Avg.
41°
27°
31
Hist. Avg.
41°
27°
1
Hist. Avg.
41°
26°
2
Hist. Avg.
40°
26°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Centereach
Centereach's December 2026 forecast shows daily high temperatures ranging from 39° to 56°, with overnight lows between 25° and 40°. The average high for December is 45° 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 Centereach. See also: January | February | March.
