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°
54°
5
84°
62°
6
69°
51°
7
60°
43°
8
61°
42°
9
61°
46°
10
68°
52°
11
63°
46°
12
64°
47°
13
66°
51°
14
65°
51°
15
68°
50°
16
70°
52°
17
72°
51°
18
76°
56°
19
76°
55°
20
75°
56°
21
75°
56°
22
73°
50°
23
69°
48°
24
67°
50°
25
68°
50°
26
69°
51°
27
69°
50°
28
70°
51°
29
70°
50°
30
69°
51°
31
71°
59°
1
75°
59°
2
72°
54°
3
72°
58°
4
77°
60°
5
75°
57°
6
76°
59°
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 60° to 84°, with overnight lows between 42° and 62°. The average high for May is 70° with an average low of 52°. 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.
