S
M
T
W
T
F
S
30
87°
76°
31
88°
76°
1
89°
77°
2
90°
77°
3
88°
76°
4
88°
77°
5
89°
77°
6
88°
77°
7
87°
79°
8
88°
79°
9
90°
77°
10
89°
76°
11
90°
77°
12
89°
77°
13
90°
76°
14
90°
76°
15
88°
77°
16
85°
76°
17
85°
77°
18
86°
77°
19
86°
77°
20
86°
76°
21
86°
77°
22
86°
77°
23
85°
76°
24
85°
77°
25
86°
77°
26
85°
76°
27
85°
77°
28
86°
77°
29
85°
76°
30
86°
76°
1
85°
77°
2
85°
76°
3
86°
77°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Oahu Market
Oahu Market's September 2026 forecast shows daily high temperatures ranging from 85° to 90°, with overnight lows between 76° and 79°. The average high for September is 87° with an average low of 77°. 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 Oahu Market. See also: October | November | December.
