S
M
T
W
T
F
S
26
85°
72°
27
86°
73°
28
84°
74°
29
84°
72°
30
85°
71°
1
83°
73°
2
84°
71°
3
82°
69°
4
81°
70°
5
82°
68°
6
84°
70°
7
83°
71°
8
82°
67°
9
83°
66°
10
82°
67°
11
83°
68°
12
83°
66°
13
81°
66°
14
82°
67°
15
82°
67°
16
80°
66°
17
78°
67°
18
77°
68°
19
77°
68°
20
78°
67°
21
77°
68°
22
77°
68°
23
78°
67°
24
77°
68°
25
77°
68°
26
78°
67°
27
76°
68°
28
77°
68°
29
77°
68°
30
78°
68°
31
77°
69°
1
77°
68°
2
78°
68°
3
76°
69°
4
77°
69°
5
78°
68°
6
78°
69°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Mauna Kea
Mauna Kea's May 2026 forecast shows daily high temperatures ranging from 76° to 84°, with overnight lows between 66° and 71°. The average high for May is 79° 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 Mauna Kea. See also: June | July | August.
