S
M
T
W
T
F
S
28
81°
67°
29
87°
63°
30
90°
72°
1
95°
74°
2
100°
78°
3
101°
76°
4
98°
75°
5
93°
70°
6
87°
71°
7
83°
64°
8
82°
66°
9
83°
67°
10
83°
68°
11
87°
69°
12
84°
68°
13
83°
69°
14
82°
64°
15
81°
64°
16
82°
65°
17
83°
66°
18
83°
66°
19
84°
70°
20
84°
71°
21
85°
71°
22
88°
70°
23
84°
71°
24
84°
71°
25
88°
70°
26
89°
71°
27
89°
71°
28
88°
70°
29
86°
71°
30
87°
67°
31
82°
64°
1
82°
65°
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 81° to 101°, with overnight lows between 64° and 78°. The average high for July is 87° with an average low of 69°. 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.
