S
M
T
W
T
F
S
26
70°
45°
27
61°
46°
28
54°
43°
29
65°
37°
30
61°
39°
1
62°
34°
2
71°
30°
3
75°
47°
4
85°
47°
5
60°
41°
6
60°
38°
7
72°
43°
8
71°
46°
9
75°
51°
10
72°
45°
11
75°
50°
12
76°
52°
13
83°
55°
14
78°
51°
15
79°
55°
16
75°
50°
17
77°
55°
18
77°
53°
19
76°
48°
20
74°
54°
21
72°
48°
22
68°
47°
23
69°
49°
24
70°
50°
25
69°
49°
26
70°
49°
27
71°
51°
28
70°
56°
29
71°
59°
30
74°
58°
31
72°
52°
1
73°
53°
2
75°
60°
3
79°
62°
4
80°
62°
5
82°
63°
6
77°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Dorchester
Dorchester's May 2026 forecast shows daily high temperatures ranging from 60° to 85°, with overnight lows between 38° and 63°. The average high for May is 74° with an average low of 52°. 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 Dorchester. See also: June | July | August.
