S
M
T
W
T
F
S
26
81°
49°
27
87°
50°
28
83°
57°
29
71°
63°
30
81°
63°
31
84°
59°
1
88°
63°
2
88°
70°
3
77°
62°
4
87°
58°
5
88°
59°
6
90°
68°
7
N/A
8
87°
68°
9
90°
63°
10
91°
69°
11
84°
62°
12
82°
59°
13
81°
60°
14
80°
58°
15
78°
59°
16
78°
56°
17
74°
55°
18
76°
57°
19
79°
58°
20
77°
59°
21
76°
56°
22
75°
60°
23
81°
62°
24
79°
62°
25
76°
61°
26
75°
59°
27
74°
60°
28
74°
61°
29
77°
61°
30
79°
60°
31
79°
59°
1
80°
55°
2
72°
55°
3
72°
56°
4
73°
53°
5
72°
53°
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 72° to 91°, with overnight lows between 53° and 69°. The average high for August is 78° with an average low of 59°. 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.
