S
M
T
W
T
F
S
26
64°
41°
27
68°
45°
28
57°
45°
29
68°
43°
30
72°
50°
1
61°
50°
2
59°
50°
3
59°
48°
4
57°
52°
5
59°
50°
6
57°
46°
7
57°
50°
8
63°
46°
9
66°
45°
10
61°
39°
11
57°
37°
12
61°
37°
13
57°
46°
14
54°
45°
15
55°
37°
16
55°
39°
17
57°
46°
18
54°
52°
19
59°
53°
20
60°
54°
21
66°
55°
22
66°
55°
23
66°
53°
24
70°
56°
25
73°
56°
26
72°
58°
27
71°
55°
28
70°
54°
29
69°
54°
30
65°
52°
31
61°
50°
1
61°
49°
2
60°
49°
3
61°
52°
4
62°
53°
5
64°
54°
6
65°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Llanelli
Llanelli's May 2026 forecast shows daily high temperatures ranging from 54° to 73°, with overnight lows between 49° and 58°. The average high for May is 65° with an average low of 53°. 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 Llanelli. See also: June | July | August.
