S
M
T
W
T
F
S
27
79°
58°
28
75°
55°
29
64°
51°
30
76°
52°
31
67°
53°
1
68°
50°
2
72°
49°
3
70°
48°
4
69°
52°
5
72°
53°
6
78°
52°
7
75°
56°
8
74°
54°
9
76°
53°
10
73°
58°
11
91°
62°
12
90°
61°
13
75°
60°
14
72°
57°
15
69°
50°
16
64°
47°
17
64°
53°
18
64°
49°
19
68°
48°
20
68°
47°
21
71°
50°
22
64°
48°
23
56°
51°
24
65°
54°
25
61°
55°
26
69°
58°
27
69°
56°
28
66°
54°
29
63°
54°
30
63°
53°
31
71°
52°
1
69°
53°
2
73°
52°
3
67°
54°
4
69°
55°
5
62°
55°
6
70°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Sept-Îles
Sept-Îles's August 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for August is ° with an average low of °. 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 Sept-Îles. See also: September | October | November.