S
M
T
W
T
F
S
28
71°
56°
29
68°
55°
30
72°
51°
1
72°
50°
2
71°
51°
3
68°
50°
4
69°
50°
5
70°
51°
6
71°
50°
7
72°
51°
8
72°
54°
9
73°
53°
10
68°
55°
11
72°
52°
12
73°
56°
13
74°
52°
14
73°
51°
15
73°
57°
16
74°
57°
17
74°
56°
18
72°
56°
19
70°
55°
20
70°
52°
21
71°
52°
22
73°
56°
23
74°
53°
24
73°
58°
25
75°
57°
26
72°
57°
27
70°
55°
28
71°
57°
29
69°
56°
30
69°
57°
31
73°
58°
1
70°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Llantwit Major
Llantwit Major's July 2026 forecast shows daily high temperatures ranging from 68° to 75°, with overnight lows between 50° and 58°. The average high for July is 71° 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 July weather will actually feel in Llantwit Major. See also: August | September | October.