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
54°
48°
16
54°
45°
17
55°
46°
18
55°
48°
19
55°
47°
20
54°
50°
21
57°
52°
22
61°
50°
23
61°
47°
24
65°
53°
25
68°
55°
26
68°
51°
27
66°
51°
28
61°
48°
29
60°
48°
30
59°
47°
31
60°
48°
1
55°
48°
2
56°
46°
3
56°
50°
4
57°
50°
5
59°
51°
6
60°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Llanberis
Llanberis's May 2026 forecast shows daily high temperatures ranging from 54° to 68°, with overnight lows between 46° and 55°. The average high for May is 60° 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 Llanberis. See also: June | July | August.
