S
M
T
W
T
F
S
26
43°
17°
27
47°
23°
28
57°
20°
29
55°
26°
30
65°
23°
1
71°
26°
2
71°
36°
3
79°
29°
4
54°
34°
5
49°
23°
6
58°
15°
7
69°
26°
8
77°
35°
9
69°
33°
10
75°
41°
11
81°
49°
12
77°
40°
13
88°
36°
14
73°
52°
15
70°
39°
16
67°
33°
17
54°
44°
18
46°
30°
19
67°
21°
20
72°
40°
21
62°
42°
22
70°
34°
23
75°
43°
24
84°
47°
25
92°
59°
26
92°
64°
27
89°
62°
28
86°
60°
29
85°
57°
30
84°
55°
31
81°
54°
1
83°
55°
2
80°
52°
3
82°
53°
4
81°
55°
5
80°
50°
6
78°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Brockton
Brockton's May 2026 forecast shows daily high temperatures ranging from 75° to 92°, with overnight lows between 43° and 64°. The average high for May is 83° with an average low of 54°. 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 Brockton. See also: June | July | August.