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