S
M
T
W
T
F
S
26
65°
45°
27
65°
46°
28
56°
48°
29
67°
45°
30
73°
49°
1
60°
49°
2
62°
46°
3
62°
50°
4
63°
52°
5
58°
51°
6
58°
47°
7
60°
48°
8
65°
50°
9
67°
50°
10
56°
45°
11
58°
37°
12
58°
38°
13
56°
47°
14
55°
44°
15
59°
40°
16
55°
43°
17
58°
45°
18
53°
46°
19
60°
53°
20
61°
54°
21
71°
55°
22
73°
55°
23
71°
47°
24
84°
58°
25
90°
59°
26
92°
61°
27
85°
56°
28
78°
59°
29
74°
54°
30
71°
56°
31
67°
53°
1
65°
53°
2
66°
52°
3
65°
52°
4
64°
53°
5
63°
50°
6
63°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Llantrisant
Llantrisant's May 2026 forecast shows daily high temperatures ranging from 63° to 92°, with overnight lows between 47° and 61°. The average high for May is 73° with an average low of 54°. 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 Llantrisant. See also: June | July | August.
