S
M
T
W
T
F
S
28
73°
54°
29
75°
52°
30
71°
53°
1
70°
54°
2
72°
57°
3
77°
57°
4
72°
53°
5
72°
54°
6
75°
53°
7
73°
57°
8
75°
56°
9
72°
55°
10
76°
56°
11
76°
55°
12
74°
57°
13
78°
58°
14
79°
56°
15
72°
56°
16
78°
60°
17
80°
58°
18
75°
54°
19
74°
54°
20
72°
53°
21
74°
54°
22
74°
55°
23
75°
55°
24
77°
56°
25
76°
56°
26
74°
57°
27
73°
55°
28
74°
59°
29
79°
59°
30
80°
60°
31
73°
59°
1
73°
58°
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 70° to 80°, with overnight lows between 52° and 60°. The average high for July is 75° 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 July weather will actually feel in Castine. See also: August | September | October.
