S
M
T
W
T
F
S
30
79°
59°
31
81°
62°
1
84°
62°
2
84°
61°
3
85°
55°
4
84°
53°
5
77°
54°
6
77°
60°
7
78°
59°
8
81°
58°
9
82°
59°
10
79°
58°
11
82°
57°
12
82°
58°
13
81°
58°
14
80°
57°
15
82°
58°
16
82°
56°
17
80°
57°
18
79°
52°
19
80°
49°
20
74°
48°
21
73°
47°
22
72°
54°
23
72°
51°
24
77°
47°
25
71°
46°
26
70°
46°
27
72°
48°
28
76°
51°
29
75°
50°
30
76°
49°
1
70°
50°
2
69°
44°
3
73°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Island Heights
Island Heights's September 2026 forecast shows daily high temperatures ranging from 69° to 85°, with overnight lows between 44° and 62°. The average high for September is 78° with an average low of 54°. 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 Island Heights. See also: October | November | December.
