S
M
T
W
T
F
S
26
67°
54°
27
68°
53°
28
63°
52°
29
62°
50°
30
63°
53°
31
65°
55°
1
66°
54°
2
63°
50°
3
64°
54°
4
63°
52°
5
64°
55°
6
67°
55°
7
66°
54°
8
66°
55°
9
67°
55°
10
67°
54°
11
66°
54°
12
69°
55°
13
68°
54°
14
67°
53°
15
67°
54°
16
64°
53°
17
67°
53°
18
65°
52°
19
67°
51°
20
67°
51°
21
66°
52°
22
66°
53°
23
67°
53°
24
67°
52°
25
66°
52°
26
63°
48°
27
62°
49°
28
62°
51°
29
63°
50°
30
63°
50°
31
61°
49°
1
61°
50°
2
62°
50°
3
61°
49°
4
60°
47°
5
61°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Grasmere
Grasmere's August 2026 forecast shows daily high temperatures ranging from 60° to 69°, with overnight lows between 47° and 55°. The average high for August is 65° with an average low of 52°. 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 Grasmere. See also: September | October | November.