S
M
T
W
T
F
S
26
59°
46°
27
66°
46°
28
57°
46°
29
61°
45°
30
57°
52°
1
59°
52°
2
56°
50°
3
57°
46°
4
59°
48°
5
57°
44°
6
55°
42°
7
55°
44°
8
56°
44°
9
58°
45°
10
56°
46°
11
57°
46°
12
59°
48°
13
58°
47°
14
57°
46°
15
58°
53°
16
54°
50°
17
56°
52°
18
56°
53°
19
57°
53°
20
56°
52°
21
56°
53°
22
57°
52°
23
57°
52°
24
58°
54°
25
57°
54°
26
57°
53°
27
58°
53°
28
57°
52°
29
57°
52°
30
58°
53°
31
59°
54°
1
59°
54°
2
60°
55°
3
63°
55°
4
63°
54°
5
60°
55°
6
62°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Penhallow
Penhallow's May 2026 forecast shows daily high temperatures ranging from 54° to 63°, with overnight lows between 42° and 56°. The average high for May is 58° with an average low of 51°. 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 Penhallow. See also: June | July | August.