S
M
T
W
T
F
S
26
44°
38°
27
45°
38°
28
43°
35°
29
42°
36°
30
42°
36°
1
42°
36°
2
45°
36°
3
44°
38°
4
45°
37°
5
44°
39°
6
45°
39°
7
44°
36°
8
43°
37°
9
42°
37°
10
48°
39°
11
49°
41°
12
50°
42°
13
47°
41°
14
44°
36°
15
41°
39°
16
46°
39°
17
46°
39°
18
47°
38°
19
47°
40°
20
48°
42°
21
51°
42°
22
51°
39°
23
49°
36°
24
49°
36°
25
45°
38°
26
47°
39°
27
48°
41°
28
47°
37°
29
45°
37°
30
41°
33°
31
42°
33°
1
44°
38°
2
47°
41°
3
51°
39°
4
47°
39°
5
50°
40°
6
49°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Mauna Loa Observatory
Mauna Loa Observatory's May 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for May is ° with an average low of °. 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 Loa Observatory. See also: June | July | August.
