S
M
T
W
T
F
S
26
90°
67°
27
90°
74°
28
89°
72°
29
74°
62°
30
68°
58°
1
69°
54°
2
81°
52°
3
85°
51°
4
84°
60°
5
88°
70°
6
78°
54°
7
75°
52°
8
84°
54°
9
86°
65°
10
82°
63°
11
79°
53°
12
83°
56°
13
88°
61°
14
86°
64°
15
89°
67°
16
90°
69°
17
88°
68°
18
88°
67°
19
87°
67°
20
84°
68°
21
89°
71°
22
82°
61°
23
78°
65°
24
80°
64°
25
82°
66°
26
84°
66°
27
83°
67°
28
82°
67°
29
84°
66°
30
85°
67°
31
83°
68°
1
86°
68°
2
87°
67°
3
82°
68°
4
83°
68°
5
85°
67°
6
85°
68°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Guernsey
Guernsey's May 2026 forecast shows daily high temperatures ranging from 78° to 90°, with overnight lows between 53° and 71°. The average high for May is 84° with an average low of 66°. 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 Guernsey. See also: June | July | August.
