S
M
T
W
T
F
S
26
84°
63°
27
81°
60°
28
83°
60°
29
86°
63°
30
88°
66°
31
89°
66°
1
87°
64°
2
88°
65°
3
86°
59°
4
83°
60°
5
80°
60°
6
79°
59°
7
81°
60°
8
82°
66°
9
Hist. Avg.
85°
63°
10
Hist. Avg.
85°
63°
11
Hist. Avg.
85°
63°
12
Hist. Avg.
85°
62°
13
Hist. Avg.
85°
62°
14
Hist. Avg.
85°
62°
15
Hist. Avg.
85°
62°
16
Hist. Avg.
85°
62°
17
Hist. Avg.
85°
62°
18
Hist. Avg.
85°
62°
19
Hist. Avg.
85°
62°
20
Hist. Avg.
85°
61°
21
Hist. Avg.
85°
61°
22
Hist. Avg.
85°
61°
23
Hist. Avg.
85°
61°
24
Hist. Avg.
85°
60°
25
Hist. Avg.
85°
60°
26
Hist. Avg.
85°
60°
27
Hist. Avg.
84°
60°
28
Hist. Avg.
84°
60°
29
Hist. Avg.
84°
59°
30
Hist. Avg.
84°
59°
31
Hist. Avg.
84°
59°
1
Hist. Avg.
84°
58°
2
Hist. Avg.
83°
58°
3
Hist. Avg.
83°
58°
4
Hist. Avg.
83°
58°
5
Hist. Avg.
82°
57°
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 79° to 89°, with overnight lows between 59° and 66°. The average high for August is 84° with an average low of 62°. 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.
