S
M
T
W
T
F
S
30
85°
56°
31
80°
55°
1
76°
56°
2
78°
62°
3
78°
56°
4
80°
62°
5
76°
62°
6
83°
57°
7
81°
55°
8
74°
54°
9
75°
53°
10
75°
59°
11
76°
53°
12
78°
52°
13
73°
51°
14
72°
58°
15
76°
59°
16
77°
49°
17
80°
49°
18
69°
48°
19
69°
49°
20
70°
49°
21
69°
50°
22
67°
50°
23
67°
52°
24
68°
52°
25
71°
53°
26
74°
55°
27
74°
51°
28
73°
45°
29
66°
45°
30
64°
51°
1
65°
52°
2
69°
53°
3
71°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in North Londonderry
North Londonderry's September 2026 forecast shows daily high temperatures ranging from 64° to 85°, with overnight lows between 45° and 62°. The average high for September is 74° with an average low of 53°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in North Londonderry. See also: October | November | December.
