S
M
T
W
T
F
S
30
89°
75°
31
85°
75°
1
86°
75°
2
88°
74°
3
86°
74°
4
86°
73°
5
86°
72°
6
89°
75°
7
89°
77°
8
88°
78°
9
89°
77°
10
89°
77°
11
88°
72°
12
86°
66°
13
87°
66°
14
86°
74°
15
91°
70°
16
89°
72°
17
90°
78°
18
89°
76°
19
87°
76°
20
89°
76°
21
88°
76°
22
89°
74°
23
87°
75°
24
85°
76°
25
85°
76°
26
86°
73°
27
87°
73°
28
87°
74°
29
88°
73°
30
87°
72°
1
86°
71°
2
86°
71°
3
87°
73°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Kahului
Kahului's September 2026 forecast shows daily high temperatures ranging from 85° to 88°, with overnight lows between 71° and 76°. The average high for September is 86° with an average low of 73°. 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 Kahului. See also: October | November | December.
