S
M
T
W
T
F
S
28
66°
59°
29
66°
57°
30
70°
57°
1
71°
59°
2
74°
53°
3
73°
58°
4
71°
57°
5
77°
58°
6
77°
58°
7
77°
60°
8
80°
59°
9
79°
59°
10
77°
59°
11
77°
58°
12
78°
59°
13
73°
56°
14
69°
55°
15
71°
55°
16
70°
56°
17
73°
57°
18
72°
56°
19
69°
54°
20
68°
57°
21
73°
57°
22
73°
58°
23
72°
58°
24
74°
59°
25
73°
57°
26
74°
55°
27
74°
55°
28
73°
59°
29
74°
58°
30
76°
59°
31
77°
60°
1
77°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Cardiff
Cardiff's July 2026 forecast shows daily high temperatures ranging from 68° to 80°, with overnight lows between 53° and 60°. The average high for July is 74° with an average low of 57°. 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 Cardiff. See also: August | September | October.
