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