S
M
T
W
T
F
S
26
62°
39°
27
72°
35°
28
62°
36°
29
65°
48°
30
65°
47°
1
66°
38°
2
62°
43°
3
61°
40°
4
74°
36°
5
84°
58°
6
69°
53°
7
64°
48°
8
67°
40°
9
63°
47°
10
77°
46°
11
62°
45°
12
68°
38°
13
76°
53°
14
64°
51°
15
66°
47°
16
82°
44°
17
89°
59°
18
96°
62°
19
97°
68°
20
93°
64°
21
64°
54°
22
66°
54°
23
55°
51°
24
61°
51°
25
73°
59°
26
81°
64°
27
82°
61°
28
76°
53°
29
74°
51°
30
69°
47°
31
68°
51°
1
73°
49°
2
70°
54°
3
76°
57°
4
77°
60°
5
79°
58°
6
80°
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 68° to 82°, with overnight lows between 47° and 64°. The average high for May is 75° with an average low of 56°. 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.
