S
M
T
W
T
F
S
26
65°
57°
27
66°
56°
28
66°
55°
29
65°
56°
30
66°
56°
31
66°
57°
1
68°
55°
2
66°
55°
3
67°
53°
4
67°
55°
5
68°
55°
6
67°
52°
7
67°
53°
8
66°
52°
9
68°
51°
10
68°
52°
11
69°
56°
12
69°
57°
13
68°
57°
14
70°
56°
15
70°
55°
16
68°
56°
17
67°
53°
18
65°
56°
19
67°
52°
20
67°
55°
21
69°
54°
22
69°
53°
23
68°
55°
24
65°
54°
25
66°
54°
26
64°
53°
27
64°
56°
28
67°
55°
29
65°
56°
30
65°
54°
31
66°
55°
1
67°
53°
2
66°
54°
3
65°
53°
4
66°
53°
5
65°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Killyleagh
Killyleagh's August 2026 forecast shows daily high temperatures ranging from 64° to 70°, with overnight lows between 51° and 57°. The average high for August is 67° 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 August weather will actually feel in Killyleagh. See also: September | October | November.