S
M
T
W
T
F
S
28
68°
58°
29
68°
59°
30
68°
58°
1
68°
60°
2
70°
55°
3
70°
57°
4
70°
58°
5
72°
59°
6
77°
62°
7
80°
61°
8
80°
60°
9
80°
60°
10
78°
61°
11
72°
57°
12
73°
56°
13
72°
56°
14
67°
55°
15
69°
55°
16
68°
56°
17
72°
57°
18
71°
56°
19
68°
54°
20
67°
57°
21
72°
57°
22
72°
58°
23
71°
58°
24
73°
59°
25
72°
57°
26
73°
55°
27
72°
56°
28
73°
59°
29
73°
58°
30
75°
59°
31
76°
60°
1
77°
59°
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 67° to 80°, with overnight lows between 54° and 62°. The average high for July is 72° with an average low of 58°. 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.