S
M
T
W
T
F
S
30
75°
56°
31
75°
50°
1
74°
48°
2
67°
49°
3
68°
48°
4
69°
48°
5
67°
49°
6
66°
49°
7
69°
48°
8
69°
46°
9
67°
48°
10
70°
52°
11
70°
52°
12
66°
51°
13
69°
46°
14
70°
47°
15
67°
51°
16
68°
48°
17
63°
49°
18
62°
48°
19
61°
47°
20
67°
51°
21
66°
45°
22
65°
43°
23
Hist. Avg.
62°
47°
24
Hist. Avg.
62°
47°
25
Hist. Avg.
61°
47°
26
Hist. Avg.
61°
47°
27
Hist. Avg.
61°
46°
28
Hist. Avg.
60°
46°
29
Hist. Avg.
60°
46°
30
Hist. Avg.
59°
45°
1
Hist. Avg.
59°
45°
2
Hist. Avg.
59°
45°
3
Hist. Avg.
58°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in New London
New London's September 2026 forecast shows daily high temperatures ranging from 61° to 75°, with overnight lows between 43° and 56°. The average high for September is 68° with an average low of 49°. 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.
