S
M
T
W
T
F
S
26
71°
58°
27
68°
53°
28
69°
55°
29
68°
56°
30
67°
56°
31
72°
55°
1
68°
56°
2
71°
56°
3
68°
55°
4
70°
57°
5
70°
56°
6
69°
56°
7
68°
55°
8
67°
56°
9
68°
55°
10
67°
55°
11
68°
54°
12
66°
55°
13
69°
56°
14
70°
55°
15
68°
54°
16
67°
54°
17
68°
55°
18
71°
55°
19
70°
56°
20
72°
55°
21
65°
54°
22
64°
53°
23
64°
54°
24
65°
47°
25
65°
48°
26
66°
45°
27
64°
44°
28
61°
42°
29
62°
43°
30
62°
42°
31
63°
45°
1
63°
51°
2
70°
51°
3
71°
45°
4
63°
49°
5
61°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Grosses-Roches
Grosses-Roches's August 2026 forecast shows daily high temperatures ranging from 61° to 72°, with overnight lows between 42° and 58°. The average high for August is 67° 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 Grosses-Roches. See also: September | October | November.