S
M
T
W
T
F
S
28
84°
58°
29
87°
54°
30
85°
55°
1
96°
68°
2
96°
69°
3
94°
71°
4
89°
63°
5
86°
57°
6
75°
58°
7
70°
51°
8
83°
60°
9
86°
67°
10
81°
62°
11
76°
54°
12
77°
55°
13
78°
56°
14
80°
59°
15
77°
58°
16
79°
57°
17
80°
58°
18
78°
59°
19
79°
55°
20
74°
52°
21
73°
51°
22
73°
51°
23
74°
52°
24
77°
52°
25
80°
57°
26
81°
58°
27
81°
58°
28
80°
57°
29
81°
59°
30
81°
58°
31
80°
57°
1
79°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in South Londonderry
South Londonderry's July 2026 forecast shows daily high temperatures ranging from 70° to 86°, with overnight lows between 51° and 67°. 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 South Londonderry. See also: August | September | October.