S
M
T
W
T
F
S
30
76°
51°
31
72°
52°
1
69°
48°
2
70°
49°
3
69°
50°
4
69°
59°
5
60°
54°
6
55°
49°
7
62°
49°
8
62°
46°
9
62°
41°
10
78°
55°
11
62°
47°
12
69°
43°
13
69°
47°
14
75°
47°
15
68°
46°
16
72°
47°
17
66°
53°
18
70°
47°
19
62°
43°
20
59°
48°
21
61°
39°
22
58°
40°
23
61°
40°
24
68°
44°
25
64°
46°
26
63°
45°
27
63°
45°
28
65°
44°
29
64°
46°
30
64°
47°
1
65°
48°
2
62°
41°
3
60°
42°
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 68°, with overnight lows between 39° and 48°. The average high for September is 63° with an average low of 44°. 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.
