S
M
T
W
T
F
S
29
43°
38°
30
46°
39°
1
47°
39°
2
48°
38°
3
49°
36°
4
37°
30°
5
45°
28°
6
42°
25°
7
34°
24°
8
33°
27°
9
36°
26°
10
35°
24°
11
35°
24°
12
36°
25°
13
37°
30°
14
37°
32°
15
36°
34°
16
41°
31°
17
43°
27°
18
37°
27°
19
36°
25°
20
35°
24°
21
37°
25°
22
35°
30°
23
41°
30°
24
41°
31°
25
40°
32°
26
38°
31°
27
37°
27°
28
36°
24°
29
34°
22°
30
33°
23°
31
33°
22°
1
34°
22°
2
34°
23°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in South Haven
South Haven's December 2026 forecast shows daily high temperatures ranging from 33° to 49°, with overnight lows between 22° and 39°. The average high for December is 38° 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 South Haven. See also: January | February | March.
