S
M
T
W
T
F
S
26
81°
72°
27
80°
69°
28
80°
73°
29
80°
73°
30
80°
72°
1
80°
71°
2
81°
73°
3
81°
73°
4
80°
73°
5
78°
71°
6
80°
67°
7
80°
72°
8
80°
73°
9
79°
72°
10
81°
73°
11
81°
74°
12
81°
74°
13
84°
73°
14
86°
72°
15
84°
73°
16
85°
74°
17
86°
74°
18
85°
73°
19
86°
74°
20
87°
73°
21
83°
70°
22
83°
70°
23
82°
69°
24
84°
70°
25
83°
70°
26
85°
72°
27
78°
74°
28
79°
73°
29
78°
74°
30
78°
73°
31
79°
73°
1
78°
74°
2
78°
74°
3
79°
75°
4
79°
76°
5
80°
76°
6
79°
75°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in He'eia
He'eia's May 2026 forecast shows daily high temperatures ranging from 78° to 87°, with overnight lows between 69° and 76°. The average high for May is 82° with an average low of 73°. 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 He'eia. See also: June | July | August.