S
M
T
W
T
F
S
30
84°
77°
31
85°
76°
1
85°
76°
2
84°
75°
3
84°
77°
4
85°
77°
5
84°
76°
6
84°
76°
7
85°
75°
8
84°
75°
9
84°
76°
10
83°
75°
11
83°
75°
12
84°
76°
13
83°
76°
14
83°
78°
15
84°
75°
16
85°
76°
17
84°
77°
18
85°
78°
19
85°
78°
20
84°
77°
21
85°
77°
22
85°
78°
23
84°
78°
24
85°
77°
25
85°
77°
26
84°
73°
27
84°
77°
28
85°
77°
29
85°
76°
30
84°
76°
1
83°
75°
2
84°
76°
3
84°
75°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Kahalu'u
Kahalu'u's September 2026 forecast shows daily high temperatures ranging from 83° to 85°, with overnight lows between 73° and 78°. The average high for September is 84° with an average low of 76°. 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 Kahalu'u. See also: October | November | December.
