S
M
T
W
T
F
S
30
74°
53°
31
74°
59°
1
68°
60°
2
66°
59°
3
77°
61°
4
77°
60°
5
73°
53°
6
69°
46°
7
74°
43°
8
74°
47°
9
75°
57°
10
80°
60°
11
70°
48°
12
72°
44°
13
72°
59°
14
66°
45°
15
68°
41°
16
73°
49°
17
74°
63°
18
74°
54°
19
64°
42°
20
57°
51°
21
66°
50°
22
64°
41°
23
63°
41°
24
66°
41°
25
70°
41°
26
61°
53°
27
62°
53°
28
58°
53°
29
65°
50°
30
71°
56°
1
77°
59°
2
71°
49°
3
64°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in New Marlborough
New Marlborough's September 2026 forecast shows daily high temperatures ranging from 58° to 77°, with overnight lows between 48° and 59°. The average high for September is 67° with an average low of 53°. 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 Marlborough. See also: October | November | December.
