S
M
T
W
T
F
S
28
82°
61°
29
83°
61°
30
84°
62°
1
89°
67°
2
90°
68°
3
89°
69°
4
90°
67°
5
87°
68°
6
89°
68°
7
90°
69°
8
90°
69°
9
91°
70°
10
91°
69°
11
90°
68°
12
88°
69°
13
90°
68°
14
86°
66°
15
86°
67°
16
87°
69°
17
90°
69°
18
88°
68°
19
90°
70°
20
90°
70°
21
89°
69°
22
87°
69°
23
86°
68°
24
91°
69°
25
92°
64°
26
91°
65°
27
86°
64°
28
85°
63°
29
86°
64°
30
86°
64°
31
85°
65°
1
85°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Cornwall
Cornwall's July 2026 forecast shows daily high temperatures ranging from 82° to 92°, with overnight lows between 61° and 70°. The average high for July is 88° with an average low of 67°. 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.
