S
M
T
W
T
F
S
30
86°
75°
31
86°
74°
1
87°
73°
2
86°
74°
3
86°
74°
4
87°
73°
5
86°
74°
6
86°
74°
7
87°
73°
8
86°
74°
9
86°
74°
10
87°
73°
11
86°
74°
12
86°
73°
13
87°
74°
14
89°
71°
15
89°
72°
16
88°
73°
17
89°
71°
18
90°
72°
19
89°
71°
20
89°
71°
21
88°
72°
22
89°
72°
23
90°
71°
24
90°
72°
25
89°
72°
26
90°
71°
27
90°
72°
28
89°
72°
29
90°
71°
30
90°
72°
1
89°
72°
2
90°
71°
3
90°
72°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Kahuku
Kahuku's September 2026 forecast shows daily high temperatures ranging from 86° to 90°, with overnight lows between 71° and 75°. The average high for September is 88° 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 Kahuku. See also: October | November | December.