S
M
T
W
T
F
S
30
85°
71°
31
86°
70°
1
86°
70°
2
85°
69°
3
85°
71°
4
86°
71°
5
84°
70°
6
84°
70°
7
85°
69°
8
84°
69°
9
84°
70°
10
83°
69°
11
83°
69°
12
84°
70°
13
83°
70°
14
83°
73°
15
84°
70°
16
85°
71°
17
84°
72°
18
85°
73°
19
85°
73°
20
84°
72°
21
85°
72°
22
85°
73°
23
84°
73°
24
85°
72°
25
85°
72°
26
84°
68°
27
84°
72°
28
85°
72°
29
85°
71°
30
84°
71°
1
83°
70°
2
85°
70°
3
85°
72°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Wai‘anae
Wai‘anae's September 2026 forecast shows daily high temperatures ranging from 83° to 86°, with overnight lows between 68° and 73°. The average high for September is 84° with an average low of 71°. 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 Wai‘anae. See also: October | November | December.