S
M
T
W
T
F
S
26
66°
41°
27
70°
45°
28
57°
45°
29
66°
45°
30
73°
43°
1
73°
48°
2
66°
46°
3
64°
52°
4
57°
46°
5
61°
46°
6
57°
41°
7
61°
37°
8
64°
48°
9
68°
45°
10
57°
39°
11
55°
36°
12
61°
36°
13
55°
43°
14
57°
41°
15
57°
39°
16
55°
37°
17
61°
45°
18
57°
46°
19
61°
51°
20
65°
50°
21
73°
50°
22
80°
58°
23
79°
57°
24
82°
56°
25
80°
58°
26
77°
54°
27
78°
55°
28
72°
52°
29
69°
49°
30
68°
49°
31
69°
50°
1
60°
45°
2
60°
45°
3
63°
50°
4
62°
52°
5
65°
52°
6
67°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Cornwell
Cornwell's May 2026 forecast shows daily high temperatures ranging from 60° to 82°, with overnight lows between 45° and 58°. The average high for May is 70° 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 Cornwell. See also: June | July | August.
