S
M
T
W
T
F
S
26
71°
57°
27
72°
56°
28
71°
54°
29
66°
52°
30
66°
55°
31
70°
57°
1
71°
56°
2
69°
52°
3
69°
56°
4
66°
53°
5
68°
57°
6
71°
57°
7
71°
56°
8
70°
56°
9
71°
57°
10
71°
56°
11
70°
54°
12
72°
57°
13
72°
53°
14
70°
56°
15
70°
56°
16
67°
55°
17
70°
55°
18
67°
54°
19
70°
52°
20
70°
51°
21
69°
54°
22
70°
54°
23
71°
55°
24
70°
54°
25
70°
54°
26
67°
52°
27
66°
51°
28
65°
54°
29
66°
53°
30
66°
52°
31
65°
51°
1
65°
51°
2
64°
52°
3
64°
52°
4
65°
49°
5
64°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Londonderry
Londonderry's August 2026 forecast shows daily high temperatures ranging from 64° to 72°, with overnight lows between 49° and 57°. The average high for August is 69° 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 Londonderry. See also: September | October | November.
