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°
46°
15
69°
48°
16
79°
60°
17
82°
60°
18
89°
64°
19
92°
66°
20
83°
56°
21
70°
53°
22
68°
51°
23
70°
52°
24
73°
55°
25
78°
58°
26
79°
61°
27
81°
55°
28
72°
52°
29
70°
55°
30
71°
59°
31
78°
56°
1
71°
54°
2
72°
54°
3
71°
53°
4
72°
53°
5
73°
60°
6
79°
62°
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 64° to 92°, with overnight lows between 46° and 66°. 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.
