S
M
T
W
T
F
S
29
57°
42°
30
58°
33°
1
56°
32°
2
47°
31°
3
45°
29°
4
43°
38°
5
51°
36°
6
54°
30°
7
46°
28°
8
42°
33°
9
43°
31°
10
42°
27°
11
41°
26°
12
40°
27°
13
43°
24°
14
41°
23°
15
38°
23°
16
40°
23°
17
Hist. Avg.
45°
29°
18
Hist. Avg.
44°
29°
19
Hist. Avg.
44°
29°
20
Hist. Avg.
44°
28°
21
Hist. Avg.
44°
28°
22
Hist. Avg.
43°
28°
23
Hist. Avg.
43°
28°
24
Hist. Avg.
43°
27°
25
Hist. Avg.
42°
27°
26
Hist. Avg.
42°
27°
27
Hist. Avg.
42°
27°
28
Hist. Avg.
42°
26°
29
Hist. Avg.
42°
26°
30
Hist. Avg.
41°
26°
31
Hist. Avg.
41°
26°
1
Hist. Avg.
41°
26°
2
Hist. Avg.
41°
26°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Block Island
Block Island's December 2026 forecast shows daily high temperatures ranging from 38° to 58°, with overnight lows between 23° and 42°. The average high for December is 46° with an average low of 30°. 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 Block Island. See also: January | February | March.
