S
M
T
W
T
F
S
26
68°
56°
27
70°
53°
28
70°
54°
29
72°
55°
30
72°
56°
31
73°
56°
1
69°
56°
2
68°
57°
3
69°
57°
4
68°
58°
5
68°
56°
6
69°
57°
7
68°
56°
8
68°
56°
9
69°
57°
10
68°
53°
11
68°
53°
12
70°
54°
13
69°
53°
14
68°
55°
15
71°
56°
16
71°
55°
17
72°
54°
18
72°
54°
19
71°
56°
20
72°
58°
21
72°
57°
22
71°
56°
23
71°
56°
24
70°
55°
25
71°
56°
26
71°
56°
27
69°
57°
28
70°
54°
29
67°
53°
30
66°
52°
31
68°
52°
1
66°
53°
2
69°
54°
3
67°
54°
4
67°
55°
5
64°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Llantrisant
Llantrisant's August 2026 forecast shows daily high temperatures ranging from 64° to 73°, with overnight lows between 51° and 58°. The average high for August is 69° with an average low of 55°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Llantrisant. See also: September | October | November.
