S
M
T
W
T
F
S
26
59°
45°
27
60°
40°
28
61°
46°
29
64°
44°
30
68°
42°
1
62°
41°
2
62°
41°
3
60°
43°
4
62°
46°
5
62°
43°
6
60°
43°
7
62°
44°
8
68°
45°
9
64°
43°
10
63°
44°
11
62°
44°
12
64°
46°
13
72°
55°
14
74°
54°
15
68°
53°
16
75°
55°
17
74°
51°
18
71°
49°
19
68°
48°
20
72°
55°
21
75°
51°
22
71°
48°
23
68°
49°
24
70°
49°
25
71°
51°
26
75°
57°
27
77°
58°
28
80°
51°
29
76°
53°
30
72°
56°
31
72°
58°
1
75°
53°
2
74°
52°
3
74°
51°
4
72°
53°
5
73°
55°
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 59° to 80°, with overnight lows between 40° and 59°. The average high for May is 69° with an average low of 49°. 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.
