S
M
T
W
T
F
S
30
81°
74°
31
81°
74°
1
82°
73°
2
80°
73°
3
80°
72°
4
81°
74°
5
81°
74°
6
82°
73°
7
81°
73°
8
80°
72°
9
80°
73°
10
81°
72°
11
83°
70°
12
83°
71°
13
82°
72°
14
83°
71°
15
84°
71°
16
83°
72°
17
83°
72°
18
84°
71°
19
84°
72°
20
83°
71°
21
83°
71°
22
82°
70°
23
83°
71°
24
83°
71°
25
82°
70°
26
83°
72°
27
83°
72°
28
84°
71°
29
83°
71°
30
83°
70°
1
82°
72°
2
83°
72°
3
83°
71°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Ha‘o‘u
Ha‘o‘u's September 2026 forecast shows daily high temperatures ranging from 80° to 84°, with overnight lows between 70° and 74°. The average high for September is 82° 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 Ha‘o‘u. See also: October | November | December.
