S
M
T
W
T
F
S
26
63°
55°
27
62°
52°
28
62°
53°
29
63°
57°
30
65°
53°
31
65°
57°
1
66°
57°
2
63°
56°
3
65°
57°
4
65°
57°
5
67°
56°
6
67°
56°
7
66°
54°
8
64°
54°
9
63°
52°
10
63°
56°
11
65°
57°
12
66°
58°
13
67°
57°
14
67°
57°
15
68°
56°
16
67°
56°
17
64°
55°
18
64°
56°
19
65°
56°
20
66°
54°
21
66°
54°
22
63°
51°
23
62°
55°
24
62°
53°
25
63°
52°
26
62°
51°
27
62°
51°
28
63°
54°
29
62°
53°
30
62°
51°
31
63°
51°
1
61°
53°
2
61°
51°
3
62°
50°
4
61°
49°
5
61°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Grantshouse
Grantshouse's August 2026 forecast shows daily high temperatures ranging from 61° to 68°, with overnight lows between 49° and 58°. The average high for August is 64° 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 August weather will actually feel in Grantshouse. See also: September | October | November.