S
M
T
W
T
F
S
29
43°
28°
30
42°
26°
1
42°
25°
2
41°
25°
3
42°
28°
4
43°
28°
5
45°
29°
6
43°
34°
7
42°
34°
8
42°
33°
9
43°
26°
10
40°
26°
11
51°
28°
12
49°
32°
13
45°
28°
14
51°
26°
15
43°
22°
16
40°
21°
17
38°
26°
18
40°
28°
19
45°
29°
20
46°
30°
21
48°
31°
22
49°
29°
23
49°
31°
24
48°
33°
25
51°
24°
26
52°
24°
27
49°
21°
28
38°
24°
29
38°
28°
30
47°
27°
31
46°
30°
1
48°
32°
2
49°
27°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Speonk
Speonk's December 2026 forecast shows daily high temperatures ranging from 38° to 52°, with overnight lows between 21° and 34°. The average high for December is 45° 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 Speonk. See also: January | February | March.
