S
M
T
W
T
F
S
28
66°
57°
29
64°
55°
30
63°
57°
1
63°
55°
2
63°
55°
3
69°
59°
4
66°
57°
5
64°
57°
6
64°
56°
7
68°
53°
8
70°
56°
9
64°
59°
10
70°
55°
11
69°
54°
12
73°
57°
13
71°
57°
14
69°
56°
15
73°
57°
16
69°
52°
17
68°
53°
18
69°
53°
19
65°
52°
20
64°
53°
21
65°
52°
22
65°
50°
23
66°
53°
24
69°
53°
25
69°
52°
26
68°
53°
27
69°
53°
28
65°
50°
29
65°
49°
30
64°
52°
31
65°
53°
1
66°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Castle Douglas
Castle Douglas's July 2026 forecast shows daily high temperatures ranging from 64° to 73°, with overnight lows between 49° and 59°. The average high for July is 67° with an average low of 54°. 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 Castle Douglas. See also: August | September | October.
