S
M
T
W
T
F
S
30
82°
66°
31
88°
57°
1
82°
61°
2
79°
63°
3
86°
67°
4
89°
68°
5
89°
67°
6
85°
65°
7
79°
65°
8
78°
61°
9
75°
58°
10
78°
58°
11
74°
52°
12
76°
55°
13
72°
53°
14
73°
51°
15
78°
57°
16
75°
56°
17
76°
57°
18
74°
56°
19
74°
54°
20
75°
55°
21
77°
56°
22
76°
55°
23
76°
55°
24
77°
54°
25
76°
53°
26
76°
54°
27
75°
53°
28
75°
52°
29
74°
51°
30
74°
54°
1
73°
53°
2
74°
51°
3
72°
50°
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 72° to 89°, with overnight lows between 50° and 68°. The average high for September is 77° 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 September weather will actually feel in New London. See also: October | November | December.
