S
M
T
W
T
F
S
30
80°
54°
31
82°
43°
1
72°
55°
2
71°
45°
3
71°
53°
4
75°
51°
5
76°
50°
6
75°
56°
7
71°
55°
8
73°
54°
9
72°
52°
10
74°
50°
11
76°
52°
12
76°
53°
13
77°
51°
14
73°
43°
15
78°
49°
16
78°
50°
17
76°
46°
18
73°
43°
19
75°
48°
20
75°
47°
21
74°
44°
22
75°
47°
23
76°
48°
24
75°
46°
25
74°
45°
26
70°
47°
27
71°
45°
28
67°
44°
29
71°
43°
30
71°
44°
1
70°
44°
2
69°
43°
3
63°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Fish Haven
Fish Haven's September 2026 forecast shows daily high temperatures ranging from 63° to 78°, with overnight lows between 41° and 56°. The average high for September is 73° with an average low of 48°. 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 Fish Haven. See also: October | November | December.