S
M
T
W
T
F
S
26
55°
48°
27
59°
45°
28
57°
46°
29
64°
45°
30
73°
48°
1
64°
50°
2
57°
50°
3
59°
50°
4
57°
45°
5
55°
41°
6
57°
41°
7
55°
43°
8
59°
48°
9
55°
46°
10
50°
46°
11
54°
43°
12
57°
43°
13
55°
48°
14
54°
45°
15
53°
44°
16
54°
46°
17
55°
45°
18
55°
53°
19
59°
52°
20
60°
56°
21
67°
56°
22
68°
54°
23
67°
53°
24
67°
53°
25
64°
52°
26
62°
51°
27
61°
52°
28
58°
50°
29
57°
52°
30
57°
53°
31
58°
53°
1
59°
54°
2
61°
54°
3
64°
53°
4
60°
54°
5
59°
54°
6
59°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Nefyn
Nefyn's May 2026 forecast shows daily high temperatures ranging from 53° to 68°, with overnight lows between 44° and 56°. The average high for May is 60° 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 Nefyn. See also: June | July | August.