S
M
T
W
T
F
S
28
68°
55°
29
68°
55°
30
72°
55°
1
72°
54°
2
68°
52°
3
68°
59°
4
71°
60°
5
69°
60°
6
70°
61°
7
73°
58°
8
79°
58°
9
81°
59°
10
79°
56°
11
73°
55°
12
75°
54°
13
75°
56°
14
78°
56°
15
79°
57°
16
71°
56°
17
71°
56°
18
70°
55°
19
70°
56°
20
66°
56°
21
67°
55°
22
68°
52°
23
70°
57°
24
72°
57°
25
72°
56°
26
71°
57°
27
72°
56°
28
71°
54°
29
66°
52°
30
66°
55°
31
70°
57°
1
71°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Londonderry
Londonderry's July 2026 forecast shows daily high temperatures ranging from 66° to 81°, with overnight lows between 52° and 61°. The average high for July is 72° with an average low of 56°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how July weather will actually feel in Londonderry. See also: August | September | October.
