S
M
T
W
T
F
S
26
56°
40°
27
68°
45°
28
66°
48°
29
63°
50°
30
63°
47°
1
59°
46°
2
60°
43°
3
55°
42°
4
62°
43°
5
66°
49°
6
67°
51°
7
66°
48°
8
63°
46°
9
64°
44°
10
64°
44°
11
65°
47°
12
64°
48°
13
64°
47°
14
65°
49°
15
64°
47°
16
65°
47°
17
65°
48°
18
66°
48°
19
65°
49°
20
65°
49°
21
67°
48°
22
68°
49°
23
69°
56°
24
75°
57°
25
73°
53°
26
70°
50°
27
70°
51°
28
71°
55°
29
71°
58°
30
72°
59°
31
72°
60°
1
73°
60°
2
75°
59°
3
73°
60°
4
76°
59°
5
79°
53°
6
75°
53°
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 55° to 79°, with overnight lows between 40° and 60°. The average high for May is 67° with an average low of 50°. 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.
