S
M
T
W
T
F
S
28
85°
67°
29
90°
74°
30
90°
75°
1
91°
75°
2
92°
75°
3
91°
70°
4
86°
70°
5
83°
63°
6
84°
64°
7
86°
63°
8
86°
65°
9
88°
67°
10
84°
65°
11
85°
64°
12
85°
61°
13
84°
63°
14
85°
62°
15
85°
63°
16
84°
62°
17
78°
59°
18
79°
63°
19
79°
66°
20
80°
65°
21
85°
66°
22
85°
66°
23
86°
65°
24
83°
65°
25
85°
66°
26
86°
67°
27
86°
67°
28
85°
66°
29
87°
67°
30
86°
66°
31
85°
64°
1
80°
62°
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 78° to 91°, with overnight lows between 59° and 70°. The average high for July is 84° with an average low of 65°. 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.
