S
M
T
W
T
F
S
26
81°
59°
27
81°
58°
28
80°
58°
29
76°
57°
30
82°
58°
31
83°
57°
1
75°
57°
2
75°
56°
3
74°
48°
4
71°
47°
5
74°
47°
6
76°
50°
7
79°
49°
8
80°
50°
9
76°
48°
10
80°
48°
11
74°
51°
12
74°
49°
13
73°
48°
14
73°
49°
15
76°
49°
16
75°
50°
17
76°
47°
18
73°
47°
19
73°
50°
20
77°
54°
21
78°
54°
22
72°
53°
23
79°
54°
24
79°
53°
25
77°
52°
26
73°
51°
27
77°
52°
28
74°
50°
29
74°
44°
30
69°
41°
31
67°
44°
1
67°
43°
2
66°
44°
3
67°
42°
4
66°
41°
5
66°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Rossport
Rossport's August 2026 forecast shows daily high temperatures ranging from 66° to 83°, with overnight lows between 41° and 59°. The average high for August is 75° with an average low of 50°. 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 Rossport. See also: September | October | November.