S
M
T
W
T
F
S
28
85°
65°
29
79°
62°
30
79°
60°
1
80°
64°
2
81°
61°
3
79°
60°
4
81°
65°
5
80°
66°
6
80°
65°
7
81°
64°
8
81°
67°
9
82°
66°
10
81°
67°
11
83°
67°
12
81°
66°
13
80°
67°
14
81°
68°
15
81°
64°
16
82°
62°
17
81°
63°
18
82°
62°
19
81°
62°
20
83°
61°
21
84°
67°
22
86°
67°
23
83°
68°
24
87°
61°
25
83°
62°
26
82°
61°
27
82°
61°
28
83°
62°
29
82°
61°
30
83°
62°
31
85°
67°
1
87°
67°
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 79° to 87°, with overnight lows between 60° and 68°. The average high for July is 82° with an average low of 64°. 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.
