S
M
T
W
T
F
S
30
68°
55°
31
64°
57°
1
66°
57°
2
72°
57°
3
68°
59°
4
66°
55°
5
64°
54°
6
70°
59°
7
65°
52°
8
62°
53°
9
61°
57°
10
63°
53°
11
62°
57°
12
65°
58°
13
63°
56°
14
64°
55°
15
63°
52°
16
61°
54°
17
63°
53°
18
63°
54°
19
65°
55°
20
65°
54°
21
65°
55°
22
64°
55°
23
64°
53°
24
63°
53°
25
60°
49°
26
59°
53°
27
63°
53°
28
62°
52°
29
62°
53°
30
63°
52°
1
62°
53°
2
63°
52°
3
61°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Killyleagh
Killyleagh's September 2026 forecast shows daily high temperatures ranging from 59° to 65°, with overnight lows between 49° and 58°. The average high for September is 63° with an average low of 54°. 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 Killyleagh. See also: October | November | December.
