S
M
T
W
T
F
S
26
67°
50°
27
65°
48°
28
64°
48°
29
64°
49°
30
65°
48°
1
64°
48°
2
65°
49°
3
66°
50°
4
65°
50°
5
67°
51°
6
67°
50°
7
68°
52°
8
68°
52°
9
70°
56°
10
73°
56°
11
74°
57°
12
71°
55°
13
70°
53°
14
74°
56°
15
75°
58°
16
75°
58°
17
76°
57°
18
73°
54°
19
72°
54°
20
73°
55°
21
73°
54°
22
74°
61°
23
75°
61°
24
78°
62°
25
79°
58°
26
79°
59°
27
78°
63°
28
80°
63°
29
80°
60°
30
81°
61°
31
79°
60°
1
80°
62°
2
81°
63°
3
81°
63°
4
80°
62°
5
82°
58°
6
80°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Formia
Formia's May 2026 forecast shows daily high temperatures ranging from 64° to 82°, with overnight lows between 48° and 63°. The average high for May is 73° with an average low of 56°. 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 Formia. See also: June | July | August.