S
M
T
W
T
F
S
26
63°
57°
27
70°
55°
28
73°
63°
29
68°
54°
30
64°
46°
31
63°
46°
1
68°
48°
2
66°
43°
3
70°
55°
4
72°
59°
5
63°
54°
6
63°
52°
7
68°
54°
8
68°
52°
9
61°
46°
10
66°
46°
11
N/A
12
77°
61°
13
74°
56°
14
65°
54°
15
63°
51°
16
64°
53°
17
67°
56°
18
65°
54°
19
64°
51°
20
64°
51°
21
65°
53°
22
65°
53°
23
66°
52°
24
61°
48°
25
61°
48°
26
62°
48°
27
61°
49°
28
61°
47°
29
62°
48°
30
61°
48°
31
61°
49°
1
62°
52°
2
64°
52°
3
65°
51°
4
61°
50°
5
61°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Londonderry
Londonderry's August 2026 forecast shows daily high temperatures ranging from 61° to 77°, with overnight lows between 47° and 61°. The average high for August is 64° with an average low of 51°. 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.
