S
M
T
W
T
F
S
26
70°
32°
27
59°
43°
28
55°
40°
29
67°
36°
30
77°
39°
1
76°
43°
2
76°
45°
3
81°
47°
4
76°
47°
5
66°
47°
6
58°
47°
7
64°
45°
8
64°
42°
9
69°
40°
10
64°
42°
11
72°
42°
12
81°
53°
13
64°
49°
14
61°
43°
15
52°
43°
16
56°
38°
17
65°
43°
18
70°
46°
19
69°
46°
20
69°
43°
21
68°
46°
22
69°
41°
23
70°
47°
24
65°
44°
25
66°
43°
26
65°
44°
27
66°
44°
28
68°
47°
29
63°
42°
30
66°
42°
31
71°
46°
1
71°
49°
2
63°
48°
3
63°
43°
4
64°
43°
5
63°
45°
6
63°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Herron Island
Herron Island's May 2026 forecast shows daily high temperatures ranging from 52° to 71°, with overnight lows between 38° and 49°. The average high for May is 65° with an average low of 44°. 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 Herron Island. See also: June | July | August.