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°
36°
5
84°
58°
6
69°
53°
7
64°
48°
8
67°
40°
9
63°
47°
10
77°
46°
11
62°
45°
12
68°
38°
13
76°
53°
14
64°
51°
15
66°
47°
16
82°
44°
17
89°
59°
18
96°
62°
19
97°
68°
20
92°
58°
21
62°
51°
22
64°
50°
23
54°
51°
24
62°
56°
25
69°
57°
26
79°
60°
27
82°
57°
28
80°
58°
29
78°
57°
30
77°
59°
31
77°
60°
1
80°
59°
2
77°
58°
3
80°
60°
4
81°
61°
5
82°
63°
6
81°
62°
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 54° to 92°, with overnight lows between 50° and 63°. The average high for May is 75° with an average low of 58°. 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.
