S
M
T
W
T
F
S
30
74°
56°
31
74°
55°
1
73°
54°
2
67°
53°
3
67°
53°
4
69°
52°
5
71°
53°
6
72°
54°
7
72°
53°
8
70°
53°
9
70°
52°
10
72°
53°
11
71°
53°
12
72°
52°
13
71°
53°
14
69°
42°
15
65°
41°
16
62°
44°
17
63°
43°
18
71°
40°
19
66°
44°
20
68°
40°
21
69°
42°
22
60°
37°
23
58°
38°
24
59°
40°
25
63°
46°
26
65°
44°
27
66°
38°
28
62°
46°
29
65°
47°
30
66°
45°
1
67°
46°
2
64°
41°
3
65°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Cape Breton
Cape Breton's September 2026 forecast shows daily high temperatures ranging from 58° to 74°, with overnight lows between 37° and 56°. The average high for September is 67° with an average low of 47°. 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 Cape Breton. See also: October | November | December.
