S
M
T
W
T
F
S
28
70°
53°
29
71°
52°
30
71°
52°
1
72°
56°
2
73°
59°
3
77°
60°
4
75°
60°
5
76°
59°
6
79°
60°
7
79°
61°
8
78°
61°
9
75°
60°
10
74°
55°
11
72°
54°
12
71°
55°
13
70°
55°
14
71°
56°
15
72°
55°
16
73°
59°
17
73°
58°
18
74°
55°
19
75°
61°
20
76°
59°
21
74°
57°
22
74°
60°
23
75°
59°
24
81°
54°
25
76°
54°
26
73°
55°
27
76°
56°
28
75°
56°
29
76°
55°
30
75°
55°
31
75°
56°
1
76°
57°
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 70° to 81°, with overnight lows between 52° and 61°. The average high for July is 74° 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.
