S
M
T
W
T
F
S
27
70°
46°
28
75°
41°
29
81°
48°
30
86°
63°
1
86°
63°
2
86°
63°
3
81°
63°
4
73°
59°
5
73°
55°
6
75°
52°
7
79°
52°
8
81°
55°
9
77°
55°
10
70°
46°
11
72°
50°
12
72°
61°
13
77°
63°
14
75°
61°
15
82°
63°
16
86°
64°
17
86°
64°
18
81°
63°
19
82°
54°
20
77°
57°
21
68°
59°
22
79°
55°
23
72°
45°
24
73°
43°
25
73°
50°
26
66°
57°
27
61°
55°
28
68°
57°
29
75°
57°
30
77°
59°
31
77°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Cornwall
Cornwall's May 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for May is ° with an average low of °. 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 Cornwall. See also: June | July | August.
