S
M
T
W
T
F
S
30
79°
52°
31
78°
53°
1
68°
61°
2
72°
61°
3
79°
60°
4
82°
58°
5
76°
53°
6
72°
48°
7
78°
46°
8
79°
55°
9
73°
66°
10
83°
53°
11
75°
42°
12
77°
56°
13
81°
56°
14
80°
53°
15
75°
59°
16
74°
52°
17
73°
51°
18
69°
50°
19
68°
44°
20
67°
47°
21
70°
46°
22
66°
50°
23
67°
51°
24
70°
49°
25
71°
50°
26
73°
46°
27
65°
41°
28
69°
46°
29
72°
49°
30
73°
49°
1
73°
48°
2
71°
49°
3
69°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Brattleboro
Brattleboro's September 2026 forecast shows daily high temperatures ranging from 65° to 83°, with overnight lows between 41° and 66°. The average high for September is 72° with an average low of 50°. 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 Brattleboro. See also: October | November | December.
