S
M
T
W
T
F
S
26
65°
45°
27
65°
46°
28
56°
48°
29
67°
45°
30
73°
49°
1
60°
49°
2
62°
46°
3
62°
50°
4
63°
52°
5
58°
51°
6
58°
47°
7
60°
48°
8
65°
50°
9
67°
50°
10
56°
45°
11
58°
37°
12
58°
38°
13
56°
47°
14
55°
44°
15
59°
40°
16
55°
43°
17
58°
45°
18
53°
46°
19
57°
51°
20
59°
52°
21
67°
52°
22
73°
58°
23
73°
54°
24
77°
58°
25
78°
58°
26
72°
57°
27
71°
55°
28
67°
52°
29
66°
51°
30
65°
50°
31
66°
51°
1
60°
48°
2
61°
48°
3
62°
51°
4
62°
52°
5
64°
53°
6
65°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Pen-y-cae
Pen-y-cae's May 2026 forecast shows daily high temperatures ranging from 57° to 78°, with overnight lows between 48° and 58°. The average high for May is 67° with an average low of 53°. 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 Pen-y-cae. See also: June | July | August.