S
M
T
W
T
F
S
26
59°
39°
27
59°
41°
28
58°
45°
29
58°
47°
30
57°
45°
1
58°
46°
2
60°
43°
3
59°
43°
4
64°
44°
5
63°
45°
6
66°
44°
7
66°
48°
8
63°
47°
9
65°
44°
10
63°
43°
11
63°
42°
12
64°
43°
13
63°
44°
14
63°
45°
15
64°
45°
16
63°
44°
17
63°
44°
18
65°
45°
19
66°
45°
20
65°
49°
21
66°
48°
22
67°
50°
23
68°
54°
24
72°
54°
25
73°
53°
26
68°
50°
27
69°
53°
28
72°
54°
29
70°
55°
30
69°
54°
31
69°
54°
1
70°
56°
2
71°
56°
3
71°
55°
4
76°
56°
5
79°
51°
6
75°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Dedham
Dedham's May 2026 forecast shows daily high temperatures ranging from 57° to 79°, with overnight lows between 39° and 56°. The average high for May is 66° with an average low of 48°. 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 Dedham. See also: June | July | August.
