S
M
T
W
T
F
S
30
89°
75°
31
85°
75°
1
86°
75°
2
88°
74°
3
86°
74°
4
86°
73°
5
86°
72°
6
89°
75°
7
89°
77°
8
88°
78°
9
89°
77°
10
89°
77°
11
88°
72°
12
86°
66°
13
87°
66°
14
86°
74°
15
91°
70°
16
88°
77°
17
87°
76°
18
89°
75°
19
87°
75°
20
87°
76°
21
90°
76°
22
88°
75°
23
89°
74°
24
87°
75°
25
88°
73°
26
89°
72°
27
87°
73°
28
87°
72°
29
89°
70°
30
87°
72°
1
86°
73°
2
85°
73°
3
86°
73°
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 85° to 90°, with overnight lows between 70° and 77°. The average high for September is 88° with an average low of 74°. 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.