S
M
T
W
T
F
S
26
65°
37°
27
72°
31°
28
68°
35°
29
65°
34°
30
52°
45°
1
60°
43°
2
56°
39°
3
56°
39°
4
65°
41°
5
75°
52°
6
67°
53°
7
60°
42°
8
55°
38°
9
58°
43°
10
58°
43°
11
64°
42°
12
64°
44°
13
60°
46°
14
62°
42°
15
65°
42°
16
64°
41°
17
64°
41°
18
65°
49°
19
68°
49°
20
71°
48°
21
73°
50°
22
71°
46°
23
63°
45°
24
67°
46°
25
67°
43°
26
68°
45°
27
68°
47°
28
66°
50°
29
71°
52°
30
72°
50°
31
73°
46°
1
69°
45°
2
68°
45°
3
69°
46°
4
69°
46°
5
70°
47°
6
70°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Brattleboro
Brattleboro's May 2026 forecast shows daily high temperatures ranging from 55° to 75°, with overnight lows between 38° and 53°. The average high for May is 66° with an average low of 45°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Brattleboro. See also: June | July | August.