S
M
T
W
T
F
S
29
41°
27°
30
40°
25°
1
39°
24°
2
38°
24°
3
39°
27°
4
42°
26°
5
43°
27°
6
41°
31°
7
38°
33°
8
39°
32°
9
39°
24°
10
36°
23°
11
48°
27°
12
47°
30°
13
40°
27°
14
47°
25°
15
40°
19°
16
37°
20°
17
34°
23°
18
37°
26°
19
41°
27°
20
41°
29°
21
43°
29°
22
45°
28°
23
45°
30°
24
44°
32°
25
48°
23°
26
48°
23°
27
46°
20°
28
34°
23°
29
35°
26°
30
43°
26°
31
43°
29°
1
45°
30°
2
46°
26°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in New Britain
New Britain's December 2026 forecast shows daily high temperatures ranging from 34° to 48°, with overnight lows between 19° and 33°. The average high for December is 41° with an average low of 26°. 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 New Britain. See also: January | February | March.
