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