S
M
T
W
T
F
S
28
88°
70°
29
95°
74°
30
96°
72°
1
98°
74°
2
99°
74°
3
98°
71°
4
93°
69°
5
90°
70°
6
92°
73°
7
86°
68°
8
86°
67°
9
85°
70°
10
85°
71°
11
84°
67°
12
80°
67°
13
87°
67°
14
87°
66°
15
89°
69°
16
87°
68°
17
85°
68°
18
85°
67°
19
86°
68°
20
87°
67°
21
88°
68°
22
89°
68°
23
89°
69°
24
87°
69°
25
83°
68°
26
83°
68°
27
84°
69°
28
84°
69°
29
85°
68°
30
85°
69°
31
86°
70°
1
87°
69°
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 80° to 89°, with overnight lows between 66° and 71°. The average high for July is 86° with an average low of 68°. 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.
