S
M
T
W
T
F
S
31
58°
47°
1
58°
48°
2
63°
48°
3
60°
46°
4
59°
46°
5
59°
46°
6
60°
47°
7
61°
50°
8
63°
50°
9
61°
49°
10
62°
48°
11
61°
47°
12
61°
51°
13
64°
52°
14
63°
49°
15
62°
49°
16
62°
50°
17
64°
52°
18
67°
53°
19
65°
54°
20
67°
53°
21
65°
47°
22
63°
48°
23
65°
54°
24
67°
53°
25
66°
53°
26
67°
51°
27
68°
50°
28
66°
50°
29
69°
54°
30
72°
55°
1
69°
54°
2
72°
54°
3
73°
55°
4
72°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Cornwall
Cornwall's June 2026 forecast shows daily high temperatures ranging from 58° to 73°, with overnight lows between 46° and 55°. The average high for June is 64° with an average low of 50°. 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.
