S
M
T
W
T
F
S
28
85°
61°
29
87°
61°
30
89°
58°
1
95°
69°
2
97°
73°
3
97°
72°
4
91°
74°
5
86°
60°
6
78°
64°
7
70°
56°
8
85°
61°
9
92°
68°
10
88°
63°
11
83°
58°
12
83°
59°
13
84°
64°
14
88°
63°
15
82°
62°
16
84°
61°
17
83°
61°
18
83°
60°
19
80°
61°
20
81°
59°
21
77°
58°
22
77°
58°
23
78°
59°
24
78°
58°
25
80°
61°
26
79°
63°
27
82°
64°
28
84°
64°
29
84°
63°
30
83°
64°
31
80°
64°
1
79°
63°
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 70° to 92°, with overnight lows between 56° and 68°. The average high for July is 82° with an average low of 61°. 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.
