S
M
T
W
T
F
S
26
69°
55°
27
69°
54°
28
69°
54°
29
72°
52°
30
74°
55°
1
67°
59°
2
60°
50°
3
61°
50°
4
64°
54°
5
71°
55°
6
72°
53°
7
73°
57°
8
76°
63°
9
89°
60°
10
73°
59°
11
90°
64°
12
77°
61°
13
80°
65°
14
75°
63°
15
72°
60°
16
78°
61°
17
76°
60°
18
71°
59°
19
70°
59°
20
72°
64°
21
73°
59°
22
76°
59°
23
72°
65°
24
73°
66°
25
74°
67°
26
76°
61°
27
77°
61°
28
77°
62°
29
78°
64°
30
76°
59°
31
78°
64°
1
78°
66°
2
78°
67°
3
78°
69°
4
79°
68°
5
80°
70°
6
80°
69°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Heraklion
Heraklion's May 2026 forecast shows daily high temperatures ranging from 76° to 80°, with overnight lows between 59° and 70°. The average high for May is 78° with an average low of 65°. 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 Heraklion. See also: June | July | August.