S
M
T
W
T
F
S
31
71°
39°
1
64°
44°
2
73°
42°
3
80°
52°
4
83°
51°
5
85°
52°
6
86°
58°
7
79°
63°
8
78°
54°
9
80°
56°
10
N/A
11
87°
67°
12
92°
61°
13
85°
57°
14
88°
61°
15
74°
55°
16
71°
54°
17
76°
55°
18
71°
57°
19
74°
57°
20
75°
59°
21
77°
57°
22
72°
57°
23
71°
56°
24
73°
54°
25
71°
55°
26
71°
52°
27
70°
52°
28
70°
53°
29
71°
52°
30
71°
52°
1
72°
56°
2
73°
59°
3
77°
60°
4
75°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
June Weather in Cornwall
Cornwall's June 2026 forecast shows daily high temperatures ranging from 70° to 92°, with overnight lows between 52° and 67°. The average high for June is 75° 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 June weather will actually feel in Cornwall. See also: July | August | September.
