S
M
T
W
T
F
S
30
60°
55°
31
61°
56°
1
63°
55°
2
62°
56°
3
64°
56°
4
64°
55°
5
63°
55°
6
63°
56°
7
64°
55°
8
64°
55°
9
63°
56°
10
64°
56°
11
63°
54°
12
63°
52°
13
60°
50°
14
59°
52°
15
58°
54°
16
59°
55°
17
63°
51°
18
62°
51°
19
59°
53°
20
59°
53°
21
62°
52°
22
60°
52°
23
57°
53°
24
58°
54°
25
60°
49°
26
59°
50°
27
56°
52°
28
60°
53°
29
59°
51°
30
59°
53°
1
60°
52°
2
60°
50°
3
55°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Ballycastle
Ballycastle's September 2026 forecast shows daily high temperatures ranging from 55° to 64°, with overnight lows between 49° and 56°. The average high for September is 61° with an average low of 53°. 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 Ballycastle. See also: October | November | December.
