S
M
T
W
T
F
S
30
86°
70°
31
83°
70°
1
86°
67°
2
84°
73°
3
81°
72°
4
82°
71°
5
83°
71°
6
81°
72°
7
82°
75°
8
86°
74°
9
86°
71°
10
86°
70°
11
86°
67°
12
85°
66°
13
85°
67°
14
83°
68°
15
84°
70°
16
85°
71°
17
84°
68°
18
83°
67°
19
85°
67°
20
84°
68°
21
83°
68°
22
84°
67°
23
83°
68°
24
80°
69°
25
79°
69°
26
79°
69°
27
80°
68°
28
79°
69°
29
79°
69°
30
80°
68°
1
79°
68°
2
79°
69°
3
80°
69°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Wahiawa
Wahiawa's September 2026 forecast shows daily high temperatures ranging from 79° to 86°, with overnight lows between 66° and 71°. The average high for September is 82° with an average low of 68°. 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 Wahiawa. See also: October | November | December.
