S
M
T
W
T
F
S
26
55°
48°
27
59°
45°
28
57°
46°
29
64°
45°
30
73°
48°
1
64°
50°
2
57°
50°
3
59°
50°
4
57°
45°
5
55°
41°
6
57°
41°
7
55°
43°
8
59°
48°
9
55°
46°
10
50°
46°
11
54°
43°
12
57°
43°
13
55°
48°
14
54°
45°
15
54°
48°
16
54°
45°
17
55°
46°
18
55°
48°
19
N/A
20
61°
54°
21
65°
56°
22
65°
52°
23
67°
51°
24
72°
56°
25
77°
58°
26
75°
56°
27
71°
52°
28
68°
51°
29
65°
49°
30
63°
49°
31
63°
48°
1
64°
49°
2
60°
47°
3
60°
51°
4
61°
49°
5
60°
51°
6
60°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Penmon
Penmon's May 2026 forecast shows daily high temperatures ranging from 60° to 77°, with overnight lows between 47° and 58°. The average high for May is 65° 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 Penmon. See also: June | July | August.