S
M
T
W
T
F
S
26
60°
49°
27
69°
41°
28
64°
48°
29
65°
54°
30
69°
48°
1
68°
39°
2
64°
38°
3
67°
43°
4
75°
52°
5
81°
61°
6
76°
62°
7
71°
42°
8
65°
43°
9
68°
46°
10
74°
52°
11
71°
48°
12
68°
49°
13
73°
51°
14
76°
53°
15
79°
50°
16
78°
54°
17
79°
55°
18
79°
56°
19
78°
56°
20
80°
55°
21
79°
56°
22
75°
48°
23
70°
48°
24
71°
49°
25
72°
51°
26
74°
50°
27
72°
49°
28
73°
50°
29
74°
51°
30
74°
57°
31
78°
59°
1
79°
59°
2
75°
58°
3
77°
57°
4
80°
58°
5
83°
60°
6
83°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Big Island
Big Island's May 2026 forecast shows daily high temperatures ranging from 64° to 83°, with overnight lows between 38° and 62°. The average high for May is 75° with an average low of 52°. 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 Big Island. See also: June | July | August.
