S
M
T
W
T
F
S
29
43°
31°
30
45°
27°
1
42°
25°
2
40°
27°
3
41°
26°
4
41°
28°
5
39°
32°
6
43°
37°
7
47°
40°
8
54°
36°
9
55°
34°
10
46°
31°
11
43°
32°
12
43°
29°
13
44°
30°
14
41°
27°
15
43°
24°
16
43°
25°
17
37°
23°
18
37°
23°
19
38°
22°
20
37°
34°
21
45°
30°
22
47°
26°
23
41°
31°
24
40°
33°
25
48°
30°
26
46°
21°
27
42°
27°
28
40°
20°
29
42°
21°
30
33°
16°
31
47°
17°
1
35°
21°
2
36°
20°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in West Haven
West Haven's December 2026 forecast shows daily high temperatures ranging from 33° to 55°, with overnight lows between 16° and 40°. The average high for December is 42° 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 West Haven. See also: January | February | March.
