S
M
T
W
T
F
S
28
70°
57°
29
71°
56°
30
72°
58°
1
70°
59°
2
74°
59°
3
73°
58°
4
69°
58°
5
71°
57°
6
70°
54°
7
71°
55°
8
72°
59°
9
75°
59°
10
71°
58°
11
71°
60°
12
73°
60°
13
72°
59°
14
72°
60°
15
73°
60°
16
72°
61°
17
72°
61°
18
74°
60°
19
73°
61°
20
75°
61°
21
76°
60°
22
73°
62°
23
73°
62°
24
74°
61°
25
75°
61°
26
75°
62°
27
77°
62°
28
77°
61°
29
73°
62°
30
73°
62°
31
75°
61°
1
79°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Castine
Castine's July 2026 forecast shows daily high temperatures ranging from 69° to 79°, with overnight lows between 54° and 62°. The average high for July is 73° with an average low of 60°. 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 Castine. See also: August | September | October.
