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
85°
72°
4
86°
73°
5
85°
77°
6
85°
74°
7
86°
73°
8
88°
73°
9
85°
75°
10
85°
72°
11
86°
73°
12
84°
71°
13
85°
71°
14
85°
73°
15
86°
74°
16
87°
74°
17
86°
75°
18
86°
79°
19
86°
78°
20
93°
77°
21
88°
77°
22
82°
68°
23
80°
69°
24
81°
69°
25
81°
69°
26
82°
69°
27
81°
66°
28
80°
67°
29
81°
66°
30
80°
67°
31
82°
67°
1
81°
68°
2
80°
66°
3
81°
68°
4
81°
68°
5
80°
67°
6
77°
68°
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 77° to 82°, with overnight lows between 66° and 69°. 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 Mauna Kea. See also: June | July | August.
