S
M
T
W
T
F
S
31
65°
33°
1
67°
36°
2
70°
42°
3
80°
44°
4
86°
48°
5
83°
51°
6
68°
54°
7
61°
47°
8
79°
41°
9
86°
49°
10
86°
55°
11
87°
62°
12
83°
62°
13
85°
60°
14
82°
57°
15
76°
61°
16
76°
53°
17
79°
50°
18
61°
51°
19
74°
58°
20
66°
51°
21
66°
53°
22
65°
55°
23
68°
54°
24
72°
54°
25
68°
53°
26
65°
55°
27
70°
54°
28
70°
57°
29
69°
58°
30
72°
58°
1
70°
59°
2
73°
56°
3
70°
58°
4
69°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Castine
Castine's June 2026 forecast shows daily high temperatures ranging from 65° to 73°, with overnight lows between 51° and 59°. The average high for June is 69° with an average low of 56°. 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 Castine. See also: July | August | September.
