S
M
T
W
T
F
S
29
38°
21°
30
37°
21°
1
38°
22°
2
39°
25°
3
39°
27°
4
44°
30°
5
45°
33°
6
40°
32°
7
42°
29°
8
37°
27°
9
36°
22°
10
36°
20°
11
51°
36°
12
51°
25°
13
53°
23°
14
46°
19°
15
35°
21°
16
38°
18°
17
35°
24°
18
41°
31°
19
43°
33°
20
49°
33°
21
50°
32°
22
49°
31°
23
48°
33°
24
52°
29°
25
52°
21°
26
51°
18°
27
33°
22°
28
39°
27°
29
46°
30°
30
46°
32°
31
49°
33°
1
49°
30°
2
50°
22°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in New Haven District
New Haven District's December 2026 forecast shows daily high temperatures ranging from 33° to 53°, with overnight lows between 18° and 36°. The average high for December is 44° with an average low of 27°. 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 Haven District. See also: January | February | March.
