S
M
T
W
T
F
S
26
60°
42°
27
64°
45°
28
60°
44°
29
59°
43°
30
59°
44°
1
61°
45°
2
58°
43°
3
59°
44°
4
53°
40°
5
54°
41°
6
54°
41°
7
55°
40°
8
54°
41°
9
54°
45°
10
55°
45°
11
55°
44°
12
58°
46°
13
61°
46°
14
62°
45°
15
61°
49°
16
62°
48°
17
62°
49°
18
63°
49°
19
62°
48°
20
60°
46°
21
58°
46°
22
57°
47°
23
57°
48°
24
58°
49°
25
58°
50°
26
59°
48°
27
60°
50°
28
60°
49°
29
61°
50°
30
60°
50°
31
60°
48°
1
63°
51°
2
64°
51°
3
62°
46°
4
61°
46°
5
62°
47°
6
62°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Cowes
Cowes's May 2026 forecast shows daily high temperatures ranging from 53° to 64°, with overnight lows between 40° and 51°. The average high for May is 59° with an average low of 46°. 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 Cowes. See also: June | July | August.