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
77°
59°
19
64°
48°
20
61°
48°
21
63°
54°
22
60°
49°
23
62°
52°
24
62°
47°
25
62°
46°
26
59°
53°
27
60°
55°
28
57°
54°
29
64°
53°
30
70°
54°
1
78°
54°
2
84°
64°
3
68°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Braintree
Braintree's September 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 Braintree. See also: October | November | December.