S
M
T
W
T
F
S
30
87°
76°
31
88°
76°
1
88°
76°
2
88°
77°
3
88°
75°
4
87°
76°
5
88°
75°
6
89°
77°
7
88°
76°
8
89°
75°
9
88°
76°
10
88°
75°
11
89°
76°
12
88°
76°
13
89°
75°
14
88°
76°
15
85°
76°
16
86°
75°
17
85°
76°
18
85°
76°
19
86°
75°
20
85°
76°
21
85°
76°
22
86°
75°
23
85°
76°
24
85°
76°
25
86°
75°
26
86°
75°
27
85°
76°
28
85°
76°
29
86°
75°
30
85°
76°
1
85°
76°
2
86°
75°
3
85°
76°
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 89°, with overnight lows between 75° and 77°. The average high for September is 87° 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 Honolulu. See also: October | November | December.
