S
M
T
W
T
F
S
28
83°
59°
29
85°
62°
30
84°
64°
1
87°
66°
2
91°
65°
3
88°
62°
4
84°
60°
5
78°
58°
6
79°
59°
7
82°
59°
8
83°
60°
9
83°
62°
10
81°
63°
11
77°
63°
12
77°
62°
13
78°
63°
14
78°
63°
15
79°
64°
16
82°
64°
17
81°
63°
18
84°
65°
19
85°
65°
20
84°
64°
21
84°
63°
22
80°
64°
23
82°
65°
24
85°
65°
25
84°
63°
26
78°
60°
27
82°
63°
28
79°
64°
29
78°
64°
30
83°
59°
31
77°
57°
1
77°
57°
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 77° to 91°, with overnight lows between 57° and 66°. The average high for July is 82° 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 July weather will actually feel in Londonderry. See also: August | September | October.
