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
60°
44°
4
73°
55°
5
83°
61°
6
69°
49°
7
57°
41°
8
59°
42°
9
57°
44°
10
63°
45°
11
62°
47°
12
64°
47°
13
63°
48°
14
63°
49°
15
68°
50°
16
67°
51°
17
74°
56°
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 57° to 83°, with overnight lows between 41° and 61°. The average high for May is 69° 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.
