S
M
T
W
T
F
S
26
82°
69°
27
82°
70°
28
81°
69°
29
78°
70°
30
79°
69°
1
78°
70°
2
78°
70°
3
79°
69°
4
78°
69°
5
78°
70°
6
79°
70°
7
78°
71°
8
79°
71°
9
79°
70°
10
80°
71°
11
79°
71°
12
79°
70°
13
80°
70°
14
79°
71°
15
79°
71°
16
80°
70°
17
80°
71°
18
81°
71°
19
80°
72°
20
80°
72°
21
81°
71°
22
80°
72°
23
80°
72°
24
81°
71°
25
80°
72°
26
80°
72°
27
81°
71°
28
81°
72°
29
84°
69°
30
83°
71°
31
83°
70°
1
84°
71°
2
83°
72°
3
84°
71°
4
83°
71°
5
83°
70°
6
84°
71°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Hawai‘i Kai
Hawai‘i Kai's May 2026 forecast shows daily high temperatures ranging from 78° to 84°, with overnight lows between 69° and 72°. The average high for May is 80° with an average low of 71°. 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 Hawai‘i Kai. See also: June | July | August.
