S
M
T
W
T
F
S
26
81°
51°
27
83°
61°
28
66°
55°
29
64°
50°
30
67°
40°
1
62°
42°
2
60°
39°
3
76°
56°
4
79°
59°
5
63°
45°
6
61°
41°
7
60°
40°
8
68°
50°
9
71°
51°
10
71°
51°
11
73°
52°
12
72°
51°
13
73°
50°
14
76°
53°
15
74°
58°
16
71°
57°
17
76°
59°
18
77°
59°
19
77°
58°
20
78°
60°
21
79°
60°
22
77°
59°
23
75°
55°
24
73°
57°
25
78°
61°
26
77°
59°
27
75°
55°
28
74°
56°
29
74°
53°
30
75°
61°
31
82°
62°
1
78°
62°
2
83°
63°
3
83°
62°
4
76°
56°
5
76°
55°
6
77°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Herculaneum
Herculaneum's May 2026 forecast shows daily high temperatures ranging from 60° to 83°, with overnight lows between 39° and 63°. The average high for May is 74° with an average low of 55°. 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 Herculaneum. See also: June | July | August.
