S
M
T
W
T
F
S
30
75°
64°
31
77°
58°
1
78°
57°
2
74°
56°
3
73°
60°
4
76°
65°
5
81°
61°
6
81°
56°
7
73°
56°
8
73°
57°
9
75°
62°
10
73°
61°
11
74°
62°
12
71°
61°
13
71°
55°
14
70°
53°
15
69°
53°
16
70°
57°
17
70°
60°
18
76°
61°
19
77°
62°
20
78°
60°
21
75°
55°
22
74°
59°
23
68°
52°
24
74°
51°
25
66°
50°
26
66°
51°
27
Hist. Avg.
69°
52°
28
Hist. Avg.
68°
52°
29
Hist. Avg.
68°
52°
30
Hist. Avg.
68°
51°
1
Hist. Avg.
67°
51°
2
Hist. Avg.
67°
51°
3
Hist. Avg.
67°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in South Haven
South Haven's September 2026 forecast shows daily high temperatures ranging from 66° to 81°, with overnight lows between 50° and 65°. The average high for September is 74° with an average low of 58°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in South Haven. See also: October | November | December.
