S
M
T
W
T
F
S
29
48°
39°
30
53°
42°
1
52°
41°
2
52°
41°
3
54°
39°
4
51°
38°
5
52°
38°
6
50°
39°
7
53°
38°
8
46°
35°
9
43°
34°
10
43°
33°
11
42°
36°
12
42°
33°
13
43°
31°
14
43°
26°
15
39°
27°
16
38°
30°
17
40°
28°
18
39°
34°
19
48°
33°
20
48°
28°
21
42°
27°
22
38°
26°
23
36°
26°
24
39°
31°
25
42°
25°
26
47°
19°
27
37°
22°
28
32°
22°
29
36°
21°
30
35°
27°
31
37°
31°
1
49°
25°
2
46°
19°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Fishers Island
Fishers Island's December 2026 forecast shows daily high temperatures ranging from 32° to 54°, with overnight lows between 19° and 42°. The average high for December is 44° 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 Fishers Island. See also: January | February | March.
