S
M
T
W
T
F
S
28
82°
53°
29
83°
54°
30
83°
55°
1
91°
66°
2
91°
67°
3
90°
68°
4
82°
58°
5
83°
53°
6
81°
59°
7
78°
61°
8
85°
56°
9
86°
66°
10
80°
59°
11
78°
54°
12
83°
51°
13
86°
55°
14
87°
70°
15
80°
60°
16
82°
55°
17
78°
50°
18
73°
55°
19
74°
54°
20
78°
53°
21
76°
62°
22
77°
59°
23
77°
48°
24
81°
48°
25
84°
52°
26
82°
57°
27
85°
63°
28
79°
63°
29
69°
60°
30
71°
60°
31
76°
61°
1
79°
62°
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 69° to 85°, with overnight lows between 57° and 63°. The average high for July is 77° with an average low of 61°. 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.
