S
M
T
W
T
F
S
26
46°
33°
27
50°
31°
28
54°
33°
29
61°
30°
30
60°
39°
1
67°
35°
2
78°
29°
3
73°
37°
4
66°
40°
5
47°
37°
6
57°
29°
7
71°
33°
8
71°
44°
9
69°
45°
10
73°
38°
11
90°
41°
12
78°
46°
13
93°
48°
14
85°
54°
15
82°
48°
16
80°
48°
17
63°
46°
18
48°
38°
19
59°
32°
20
69°
38°
21
71°
40°
22
64°
40°
23
75°
41°
24
83°
46°
25
85°
50°
26
83°
53°
27
75°
52°
28
80°
54°
29
80°
56°
30
79°
52°
31
83°
53°
1
76°
52°
2
78°
53°
3
77°
54°
4
77°
56°
5
82°
57°
6
77°
51°
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 75° to 85°, with overnight lows between 46° and 57°. The average high for May is 80° with an average low of 53°. 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.
