S
M
T
W
T
F
S
30
80°
60°
31
81°
59°
1
81°
59°
2
80°
60°
3
80°
60°
4
81°
59°
5
82°
60°
6
81°
60°
7
82°
61°
8
81°
61°
9
82°
60°
10
82°
61°
11
81°
61°
12
82°
56°
13
82°
60°
14
81°
60°
15
81°
59°
16
80°
60°
17
81°
60°
18
81°
59°
19
80°
60°
20
79°
59°
21
81°
60°
22
80°
59°
23
81°
59°
24
79°
58°
25
80°
59°
26
81°
59°
27
Hist. Avg.
83°
66°
28
Hist. Avg.
83°
66°
29
Hist. Avg.
83°
66°
30
Hist. Avg.
83°
66°
1
Hist. Avg.
83°
66°
2
Hist. Avg.
83°
66°
3
Hist. Avg.
83°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Ka‘au
Ka‘au's September 2026 forecast shows daily high temperatures ranging from 79° to 82°, with overnight lows between 56° and 61°. The average high for September is 81° with an average low of 60°. 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.
