S
M
T
W
T
F
S
26
58°
46°
27
60°
44°
28
61°
43°
29
60°
46°
30
61°
47°
1
61°
44°
2
63°
45°
3
62°
44°
4
61°
42°
5
60°
42°
6
62°
43°
7
64°
46°
8
69°
48°
9
65°
50°
10
65°
46°
11
66°
44°
12
61°
45°
13
61°
44°
14
63°
45°
15
65°
46°
16
64°
47°
17
66°
50°
18
67°
49°
19
67°
47°
20
68°
47°
21
68°
51°
22
69°
50°
23
71°
57°
24
76°
58°
25
78°
58°
26
77°
57°
27
77°
59°
28
79°
60°
29
81°
58°
30
81°
52°
31
72°
52°
1
71°
53°
2
72°
54°
3
73°
60°
4
78°
60°
5
77°
59°
6
74°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Gwynedd
Gwynedd's May 2026 forecast shows daily high temperatures ranging from 58° to 81°, with overnight lows between 42° and 60°. The average high for May is 68° with an average low of 50°. 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 Gwynedd. See also: June | July | August.
