S
M
T
W
T
F
S
31
62°
48°
1
63°
44°
2
61°
44°
3
62°
45°
4
61°
46°
5
62°
45°
6
63°
48°
7
64°
49°
8
63°
47°
9
63°
47°
10
64°
49°
11
66°
51°
12
72°
49°
13
68°
48°
14
69°
48°
15
68°
53°
16
69°
55°
17
75°
54°
18
76°
56°
19
76°
56°
20
77°
55°
21
76°
56°
22
76°
57°
23
75°
56°
24
78°
52°
25
76°
55°
26
76°
58°
27
77°
57°
28
78°
58°
29
77°
59°
30
77°
58°
1
78°
52°
2
76°
56°
3
74°
57°
4
72°
60°
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 61° to 78°, with overnight lows between 44° and 60°. The average high for June is 71° with an average low of 52°. 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.
