S
M
T
W
T
F
S
30
80°
58°
31
82°
59°
1
86°
63°
2
87°
67°
3
87°
65°
4
86°
57°
5
86°
63°
6
85°
64°
7
86°
66°
8
87°
64°
9
88°
65°
10
88°
64°
11
86°
64°
12
85°
63°
13
84°
64°
14
83°
63°
15
84°
63°
16
81°
62°
17
78°
61°
18
78°
56°
19
77°
52°
20
74°
56°
21
74°
55°
22
75°
51°
23
73°
56°
24
72°
60°
25
74°
58°
26
78°
59°
27
72°
60°
28
77°
58°
29
73°
58°
30
72°
48°
1
73°
45°
2
67°
44°
3
66°
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 66° to 88°, with overnight lows between 44° and 67°. The average high for September is 80° with an average low of 59°. 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.
