S
M
T
W
T
F
S
26
62°
39°
27
72°
35°
28
62°
36°
29
64°
48°
30
64°
42°
1
61°
43°
2
59°
39°
3
60°
42°
4
63°
49°
5
67°
49°
6
69°
55°
7
70°
49°
8
63°
45°
9
60°
46°
10
62°
46°
11
64°
48°
12
63°
49°
13
63°
48°
14
65°
47°
15
65°
52°
16
66°
51°
17
66°
51°
18
67°
56°
19
75°
56°
20
74°
55°
21
70°
57°
22
76°
54°
23
71°
55°
24
76°
55°
25
70°
50°
26
69°
54°
27
69°
58°
28
73°
60°
29
77°
59°
30
76°
58°
31
76°
57°
1
73°
53°
2
69°
52°
3
69°
52°
4
71°
53°
5
71°
53°
6
72°
54°
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 59° to 77°, with overnight lows between 39° and 60°. The average high for May is 68° with an average low of 51°. 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.
