S
M
T
W
T
F
S
30
76°
60°
31
81°
62°
1
82°
54°
2
81°
55°
3
74°
54°
4
75°
55°
5
76°
62°
6
79°
60°
7
81°
54°
8
73°
59°
9
73°
60°
10
74°
60°
11
77°
59°
12
77°
58°
13
72°
58°
14
70°
52°
15
72°
51°
16
70°
50°
17
70°
53°
18
71°
56°
19
75°
56°
20
71°
57°
21
74°
55°
22
72°
48°
23
69°
54°
24
67°
56°
25
72°
51°
26
65°
51°
27
71°
54°
28
72°
53°
29
Hist. Avg.
70°
50°
30
Hist. Avg.
70°
50°
1
Hist. Avg.
70°
50°
2
Hist. Avg.
69°
49°
3
Hist. Avg.
69°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Marlborough
Marlborough's September 2026 forecast shows daily high temperatures ranging from 65° to 82°, with overnight lows between 48° and 62°. The average high for September is 74° with an average low of 56°. 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 Marlborough. See also: October | November | December.
