S
M
T
W
T
F
S
29
42°
28°
30
40°
27°
1
40°
26°
2
39°
26°
3
40°
29°
4
42°
30°
5
43°
29°
6
41°
34°
7
41°
34°
8
43°
33°
9
42°
26°
10
37°
25°
11
49°
29°
12
47°
31°
13
42°
29°
14
48°
27°
15
42°
22°
16
37°
21°
17
35°
26°
18
37°
28°
19
42°
28°
20
42°
30°
21
43°
30°
22
46°
29°
23
46°
31°
24
45°
33°
25
49°
23°
26
49°
23°
27
47°
20°
28
34°
22°
29
35°
28°
30
44°
27°
31
43°
29°
1
45°
31°
2
47°
27°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Mashantucket
Mashantucket's December 2026 forecast shows daily high temperatures ranging from 34° to 49°, with overnight lows between 20° and 34°. The average high for December is 42° 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 Mashantucket. See also: January | February | March.
