S
M
T
W
T
F
S
30
78°
67°
31
84°
71°
1
86°
73°
2
94°
72°
3
93°
70°
4
80°
69°
5
76°
65°
6
77°
58°
7
77°
59°
8
84°
70°
9
85°
68°
10
79°
57°
11
79°
60°
12
85°
62°
13
82°
67°
14
82°
66°
15
80°
62°
16
75°
56°
17
77°
60°
18
79°
57°
19
75°
58°
20
73°
43°
21
77°
59°
22
69°
58°
23
70°
59°
24
73°
58°
25
77°
58°
26
77°
57°
27
73°
57°
28
76°
59°
29
78°
59°
30
78°
58°
1
77°
57°
2
74°
53°
3
64°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Millbury
Millbury's September 2026 forecast shows daily high temperatures ranging from 64° to 85°, with overnight lows between 43° and 70°. The average high for September is 77° 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 Millbury. See also: October | November | December.
