S
M
T
W
T
F
S
28
73°
53°
29
73°
53°
30
77°
60°
1
80°
61°
2
75°
61°
3
77°
60°
4
77°
61°
5
80°
61°
6
75°
56°
7
74°
55°
8
75°
58°
9
77°
57°
10
75°
55°
11
74°
54°
12
74°
55°
13
72°
56°
14
73°
56°
15
74°
57°
16
76°
62°
17
76°
61°
18
77°
59°
19
76°
61°
20
75°
59°
21
75°
57°
22
76°
59°
23
76°
58°
24
77°
55°
25
76°
53°
26
76°
53°
27
77°
54°
28
81°
55°
29
83°
61°
30
83°
59°
31
77°
58°
1
77°
56°
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 72° to 83°, with overnight lows between 53° and 62°. The average high for July is 76° with an average low of 57°. 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.
