S
M
T
W
T
F
S
31
79°
71°
1
82°
70°
2
79°
65°
3
80°
65°
4
80°
63°
5
80°
64°
6
81°
62°
7
80°
64°
8
79°
66°
9
84°
67°
10
83°
67°
11
83°
68°
12
80°
68°
13
82°
67°
14
81°
63°
15
80°
66°
16
80°
65°
17
81°
65°
18
82°
66°
19
85°
69°
20
82°
71°
21
81°
69°
22
82°
66°
23
81°
68°
24
82°
68°
25
80°
65°
26
84°
66°
27
82°
68°
28
82°
67°
29
79°
67°
30
81°
66°
1
80°
68°
2
81°
65°
3
81°
68°
4
81°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Ka‘au
Ka‘au's September 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 Ka‘au. See also: October | November | December.
