S
M
T
W
T
F
S
26
76°
54°
27
75°
53°
28
77°
53°
29
78°
52°
30
77°
49°
31
73°
48°
1
74°
52°
2
77°
53°
3
78°
53°
4
77°
51°
5
76°
48°
6
75°
51°
7
76°
55°
8
77°
54°
9
79°
51°
10
78°
48°
11
76°
46°
12
72°
47°
13
74°
46°
14
73°
45°
15
73°
46°
16
75°
52°
17
77°
55°
18
76°
55°
19
77°
56°
20
78°
55°
21
76°
54°
22
72°
52°
23
72°
53°
24
75°
53°
25
68°
49°
26
67°
51°
27
67°
46°
28
65°
45°
29
67°
44°
30
68°
45°
31
67°
48°
1
67°
53°
2
66°
53°
3
65°
52°
4
65°
52°
5
64°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Grisdale
Grisdale's August 2026 forecast shows daily high temperatures ranging from 64° to 79°, with overnight lows between 44° and 56°. The average high for August is 73° with an average low of 51°. 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 Grisdale. See also: September | October | November.