S
M
T
W
T
F
S
28
73°
59°
29
79°
52°
30
78°
54°
1
72°
56°
2
83°
61°
3
78°
56°
4
75°
56°
5
75°
53°
6
73°
54°
7
74°
55°
8
75°
56°
9
81°
55°
10
81°
59°
11
82°
57°
12
80°
54°
13
74°
56°
14
75°
56°
15
75°
55°
16
76°
54°
17
75°
56°
18
76°
58°
19
78°
58°
20
79°
57°
21
81°
59°
22
81°
59°
23
82°
58°
24
81°
59°
25
82°
60°
26
83°
59°
27
81°
59°
28
80°
58°
29
82°
59°
30
79°
59°
31
80°
58°
1
75°
58°
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 72° to 83°, with overnight lows between 52° and 61°. The average high for July is 78° with an average low of 57°. 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.
