S
M
T
W
T
F
S
30
80°
61°
31
79°
60°
1
80°
55°
2
72°
53°
3
72°
55°
4
73°
52°
5
72°
52°
6
75°
59°
7
78°
59°
8
73°
58°
9
72°
58°
10
75°
57°
11
78°
57°
12
77°
58°
13
78°
58°
14
78°
48°
15
70°
48°
16
67°
48°
17
70°
47°
18
68°
46°
19
67°
47°
20
68°
50°
21
75°
52°
22
74°
53°
23
75°
45°
24
74°
44°
25
68°
43°
26
67°
46°
27
71°
50°
28
72°
50°
29
72°
43°
30
70°
42°
1
65°
44°
2
65°
44°
3
69°
48°
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 65° to 80°, with overnight lows between 42° and 61°. The average high for September is 73° with an average low of 51°. 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.
