S
M
T
W
T
F
S
31
86°
75°
1
89°
77°
2
89°
74°
3
90°
76°
4
90°
76°
5
90°
72°
6
90°
76°
7
86°
73°
8
89°
74°
9
89°
77°
10
88°
76°
11
91°
77°
12
89°
77°
13
90°
78°
14
89°
78°
15
89°
76°
16
88°
77°
17
88°
78°
18
89°
78°
19
90°
78°
20
89°
77°
21
89°
78°
22
90°
78°
23
88°
75°
24
90°
74°
25
85°
72°
26
86°
77°
27
90°
75°
28
89°
78°
29
89°
78°
30
89°
76°
1
89°
75°
2
87°
75°
3
90°
75°
4
89°
77°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Honolulu
Honolulu'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 Honolulu. See also: October | November | December.
