S
M
T
W
T
F
S
30
85°
73°
31
85°
73°
1
86°
72°
2
85°
73°
3
85°
73°
4
86°
72°
5
85°
73°
6
85°
73°
7
86°
72°
8
85°
73°
9
85°
73°
10
86°
72°
11
85°
73°
12
85°
73°
13
86°
72°
14
88°
71°
15
88°
72°
16
87°
72°
17
88°
70°
18
89°
71°
19
88°
70°
20
88°
71°
21
87°
71°
22
88°
72°
23
89°
72°
24
89°
71°
25
88°
72°
26
89°
72°
27
89°
71°
28
88°
72°
29
89°
72°
30
89°
71°
1
88°
72°
2
89°
72°
3
89°
71°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Kaunakakai
Kaunakakai's September 2026 forecast shows daily high temperatures ranging from 85° to 89°, with overnight lows between 70° and 73°. The average high for September is 87° with an average low of 72°. 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 Kaunakakai. See also: October | November | December.
