S
M
T
W
T
F
S
28
66°
53°
29
66°
51°
30
67°
52°
1
60°
48°
2
60°
48°
3
61°
49°
4
60°
49°
5
62°
50°
6
61°
50°
7
61°
49°
8
62°
49°
9
62°
50°
10
61°
49°
11
62°
52°
12
67°
53°
13
64°
53°
14
67°
54°
15
66°
53°
16
67°
54°
17
63°
54°
18
64°
53°
19
67°
54°
20
66°
54°
21
65°
53°
22
67°
54°
23
66°
54°
24
64°
51°
25
63°
54°
26
65°
53°
27
66°
51°
28
66°
50°
29
65°
54°
30
67°
53°
31
66°
52°
1
64°
51°
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 60° to 67°, with overnight lows between 48° and 54°. The average high for July is 64° with an average low of 52°. 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.
