S
M
T
W
T
F
S
30
74°
52°
31
78°
54°
1
66°
57°
2
63°
57°
3
66°
59°
4
72°
55°
5
65°
47°
6
69°
47°
7
68°
50°
8
69°
48°
9
71°
54°
10
71°
50°
11
66°
49°
12
69°
50°
13
67°
49°
14
65°
47°
15
64°
45°
16
66°
50°
17
70°
47°
18
61°
44°
19
63°
41°
20
65°
46°
21
68°
49°
22
69°
50°
23
70°
48°
24
68°
47°
25
67°
46°
26
67°
46°
27
68°
47°
28
68°
46°
29
66°
41°
30
58°
38°
1
56°
37°
2
58°
44°
3
64°
44°
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 56° to 72°, with overnight lows between 37° and 59°. The average high for September is 66° with an average low of 48°. 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.
