S
M
T
W
T
F
S
26
58°
45°
27
60°
42°
28
60°
44°
29
61°
41°
30
60°
41°
1
63°
51°
2
71°
50°
3
65°
48°
4
62°
44°
5
62°
42°
6
64°
46°
7
63°
50°
8
71°
53°
9
70°
47°
10
63°
44°
11
64°
45°
12
64°
48°
13
65°
47°
14
65°
51°
15
66°
51°
16
66°
52°
17
71°
56°
18
75°
56°
19
76°
53°
20
68°
50°
21
70°
52°
22
71°
49°
23
70°
50°
24
69°
50°
25
72°
53°
26
75°
52°
27
74°
53°
28
77°
58°
29
79°
58°
30
79°
56°
31
73°
59°
1
71°
59°
2
73°
58°
3
73°
53°
4
78°
60°
5
80°
61°
6
81°
61°
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 58° to 81°, with overnight lows between 41° and 61°. The average high for May is 69° 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.
