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