S
M
T
W
T
F
S
29
42°
35°
30
47°
32°
1
45°
36°
2
47°
37°
3
47°
32°
4
43°
37°
5
48°
38°
6
48°
37°
7
49°
31°
8
49°
29°
9
39°
30°
10
41°
31°
11
42°
35°
12
40°
34°
13
39°
35°
14
42°
36°
15
47°
29°
16
47°
27°
17
35°
30°
18
38°
26°
19
36°
29°
20
37°
32°
21
38°
33°
22
42°
32°
23
44°
31°
24
42°
29°
25
36°
25°
26
35°
31°
27
38°
31°
28
41°
29°
29
38°
24°
30
38°
28°
31
37°
15°
1
36°
13°
2
29°
15°
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 29° to 49°, with overnight lows between 13° and 38°. The average high for December is 41° with an average low of 30°. 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.
