S
M
T
W
T
F
S
28
75°
55°
29
73°
53°
30
74°
58°
1
78°
58°
2
74°
55°
3
74°
59°
4
75°
59°
5
74°
58°
6
74°
61°
7
76°
60°
8
80°
62°
9
76°
62°
10
78°
61°
11
76°
61°
12
76°
62°
13
78°
62°
14
79°
60°
15
77°
57°
16
75°
56°
17
75°
54°
18
76°
58°
19
79°
61°
20
78°
56°
21
78°
57°
22
80°
64°
23
84°
58°
24
84°
54°
25
76°
55°
26
76°
54°
27
75°
53°
28
75°
56°
29
76°
61°
30
80°
62°
31
83°
63°
1
84°
63°
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 73° to 84°, with overnight lows between 53° and 64°. The average high for July is 77° with an average low of 59°. 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.
