S
M
T
W
T
F
S
30
64°
50°
31
64°
50°
1
63°
52°
2
63°
51°
3
64°
50°
4
64°
50°
5
63°
51°
6
64°
53°
7
65°
54°
8
67°
53°
9
65°
52°
10
65°
54°
11
64°
55°
12
67°
55°
13
66°
54°
14
67°
52°
15
66°
50°
16
61°
49°
17
61°
49°
18
62°
48°
19
60°
47°
20
60°
46°
21
61°
47°
22
60°
48°
23
61°
49°
24
61°
48°
25
60°
50°
26
60°
51°
27
62°
48°
28
61°
47°
29
59°
47°
30
59°
48°
1
60°
47°
2
58°
47°
3
59°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Ballyclare
Ballyclare's September 2026 forecast shows daily high temperatures ranging from 58° to 67°, with overnight lows between 46° and 55°. The average high for September is 62° with an average low of 50°. 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 Ballyclare. See also: October | November | December.