S
M
T
W
T
F
S
26
78°
67°
27
79°
69°
28
79°
69°
29
80°
68°
30
80°
69°
1
81°
69°
2
80°
68°
3
79°
69°
4
79°
69°
5
80°
68°
6
79°
68°
7
80°
69°
8
79°
69°
9
80°
68°
10
80°
69°
11
79°
69°
12
79°
68°
13
80°
69°
14
80°
69°
15
81°
68°
16
80°
69°
17
80°
70°
18
81°
69°
19
80°
69°
20
80°
68°
21
79°
69°
22
82°
67°
23
82°
66°
24
83°
67°
25
82°
66°
26
83°
67°
27
84°
68°
28
83°
67°
29
83°
67°
30
84°
68°
31
83°
67°
1
83°
68°
2
84°
68°
3
84°
67°
4
83°
68°
5
84°
68°
6
84°
68°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Waipahu
Waipahu's May 2026 forecast shows daily high temperatures ranging from 78° to 84°, with overnight lows between 66° and 70°. The average high for May is 81° 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 May weather will actually feel in Waipahu. See also: June | July | August.
