S
M
T
W
T
F
S
30
86°
70°
31
99°
73°
1
99°
73°
2
97°
75°
3
99°
75°
4
99°
75°
5
97°
72°
6
88°
70°
7
88°
68°
8
97°
68°
9
81°
70°
10
77°
64°
11
82°
66°
12
86°
66°
13
79°
59°
14
86°
59°
15
95°
70°
16
88°
70°
17
95°
73°
18
91°
73°
19
90°
69°
20
79°
63°
21
67°
56°
22
64°
50°
23
70°
53°
24
70°
56°
25
71°
56°
26
74°
55°
27
74°
55°
28
75°
56°
29
76°
54°
30
74°
56°
1
76°
54°
2
73°
51°
3
71°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in New London
New London's September 2026 forecast shows daily high temperatures ranging from 64° to 90°, with overnight lows between 50° and 69°. The average high for September is 74° with an average low of 56°. 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 New London. See also: October | November | December.
