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