S
M
T
W
T
F
S
30
89°
72°
31
88°
73°
1
88°
72°
2
89°
72°
3
88°
73°
4
88°
74°
5
89°
73°
6
89°
73°
7
88°
72°
8
88°
73°
9
89°
72°
10
88°
73°
11
89°
72°
12
89°
73°
13
88°
73°
14
89°
72°
15
88°
72°
16
88°
73°
17
89°
73°
18
89°
72°
19
90°
70°
20
88°
73°
21
89°
73°
22
90°
72°
23
89°
72°
24
89°
71°
25
88°
73°
26
89°
72°
27
88°
73°
28
89°
74°
29
88°
73°
30
89°
74°
1
88°
73°
2
88°
72°
3
88°
72°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Kapolei
Kapolei's September 2026 forecast shows daily high temperatures ranging from 88° to 90°, with overnight lows between 70° and 74°. The average high for September is 89° with an average low of 73°. 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 Kapolei. See also: October | November | December.
