S
M
T
W
T
F
S
28
83°
69°
29
90°
69°
30
94°
70°
1
93°
69°
2
96°
69°
3
93°
70°
4
93°
69°
5
92°
70°
6
88°
69°
7
86°
67°
8
85°
68°
9
84°
67°
10
86°
67°
11
87°
66°
12
88°
69°
13
89°
69°
14
85°
65°
15
85°
64°
16
86°
64°
17
87°
67°
18
88°
69°
19
89°
69°
20
88°
68°
21
85°
69°
22
83°
69°
23
83°
68°
24
84°
69°
25
85°
68°
26
84°
69°
27
84°
69°
28
85°
68°
29
84°
69°
30
84°
66°
31
85°
64°
1
83°
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 83° to 96°, with overnight lows between 64° and 70°. The average high for July is 87° 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.
