S
M
T
W
T
F
S
30
63°
53°
31
66°
52°
1
67°
44°
2
69°
42°
3
66°
51°
4
62°
55°
5
66°
50°
6
61°
49°
7
70°
51°
8
56°
37°
9
60°
34°
10
59°
53°
11
58°
47°
12
58°
41°
13
66°
50°
14
62°
51°
15
61°
46°
16
62°
50°
17
55°
38°
18
53°
36°
19
51°
40°
20
50°
30°
21
49°
41°
22
N/A
23
55°
44°
24
61°
42°
25
66°
42°
26
64°
44°
27
55°
46°
28
53°
47°
29
52°
47°
30
53°
46°
1
55°
45°
2
53°
46°
3
50°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in L'Île-d'Anticosti
L'Île-d'Anticosti's September 2026 forecast shows daily high temperatures ranging from 50° to 66°, with overnight lows between 42° and 47°. The average high for September is 56° with an average low of 45°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in L'Île-d'Anticosti. See also: October | November | December.
