S
M
T
W
T
F
S
28
84°
63°
29
90°
63°
30
88°
68°
1
97°
73°
2
102°
75°
3
99°
73°
4
95°
72°
5
82°
68°
6
68°
64°
7
70°
61°
8
84°
64°
9
88°
68°
10
86°
72°
11
86°
72°
12
86°
64°
13
84°
66°
14
90°
70°
15
88°
73°
16
84°
66°
17
82°
61°
18
77°
63°
19
79°
61°
20
79°
52°
21
77°
66°
22
81°
64°
23
79°
55°
24
81°
55°
25
N/A
26
84°
61°
27
83°
67°
28
76°
67°
29
74°
64°
30
78°
65°
31
83°
65°
1
86°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
July Weather in Cornwall
Cornwall's July 2026 forecast shows daily high temperatures ranging from 74° to 86°, with overnight lows between 61° and 67°. The average high for July is 81° 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 Cornwall. See also: August | September | October.
