S
M
T
W
T
F
S
30
67°
43°
31
66°
44°
1
66°
42°
2
67°
41°
3
69°
43°
4
69°
44°
5
63°
43°
6
64°
42°
7
62°
41°
8
63°
39°
9
62°
39°
10
66°
42°
11
64°
40°
12
67°
39°
13
64°
37°
14
65°
41°
15
69°
39°
16
68°
40°
17
69°
43°
18
69°
40°
19
68°
45°
20
69°
45°
21
66°
38°
22
66°
43°
23
65°
38°
24
58°
39°
25
57°
41°
26
63°
34°
27
57°
34°
28
53°
33°
29
52°
32°
30
52°
32°
1
Hist. Avg.
54°
38°
2
Hist. Avg.
54°
38°
3
Hist. Avg.
54°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in L'Anse-Saint-Jean
L'Anse-Saint-Jean's September 2026 forecast shows daily high temperatures ranging from 52° to 69°, with overnight lows between 32° and 45°. The average high for September is 64° with an average low of 40°. 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'Anse-Saint-Jean. See also: October | November | December.
