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
83°
56°
4
81°
65°
5
84°
67°
6
72°
55°
7
73°
52°
8
79°
56°
9
84°
63°
10
76°
61°
11
77°
56°
12
82°
58°
13
84°
59°
14
88°
62°
15
84°
64°
16
81°
60°
17
75°
63°
18
76°
64°
19
79°
64°
20
81°
63°
21
83°
58°
22
77°
57°
23
77°
58°
24
78°
61°
25
77°
59°
26
77°
58°
27
78°
59°
28
79°
60°
29
80°
64°
30
81°
66°
31
80°
67°
1
81°
67°
2
82°
65°
3
83°
68°
4
83°
68°
5
82°
67°
6
80°
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 72° to 88°, with overnight lows between 52° and 68°. The average high for May is 80° with an average low of 62°. 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.
