S
M
T
W
T
F
S
30
84°
61°
31
77°
61°
1
68°
60°
2
77°
60°
3
74°
62°
4
82°
63°
5
73°
60°
6
68°
53°
7
81°
53°
8
81°
60°
9
77°
61°
10
84°
68°
11
78°
50°
12
78°
50°
13
71°
57°
14
71°
54°
15
68°
41°
16
78°
49°
17
81°
63°
18
82°
50°
19
65°
44°
20
64°
57°
21
67°
51°
22
61°
52°
23
64°
52°
24
66°
54°
25
65°
53°
26
66°
52°
27
67°
51°
28
70°
50°
29
71°
53°
30
69°
52°
1
71°
48°
2
72°
52°
3
64°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Brockton
Brockton's September 2026 forecast shows daily high temperatures ranging from 61° to 82°, with overnight lows between 44° and 57°. The average high for September is 68° 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 Brockton. See also: October | November | December.
