S
M
T
W
T
F
S
30
79°
59°
31
78°
59°
1
79°
53°
2
71°
51°
3
70°
51°
4
71°
50°
5
71°
50°
6
74°
57°
7
78°
57°
8
75°
56°
9
71°
56°
10
76°
57°
11
77°
56°
12
76°
56°
13
77°
57°
14
78°
47°
15
69°
46°
16
66°
47°
17
69°
46°
18
68°
44°
19
66°
45°
20
67°
47°
21
73°
48°
22
73°
52°
23
74°
43°
24
73°
42°
25
68°
42°
26
66°
43°
27
70°
50°
28
70°
49°
29
71°
41°
30
67°
40°
1
62°
42°
2
64°
44°
3
67°
47°
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 62° to 79°, with overnight lows between 40° and 59°. The average high for September is 72° 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 Marlborough. See also: October | November | December.
