S
M
T
W
T
F
S
26
48°
38°
27
44°
37°
28
51°
33°
29
43°
31°
30
45°
27°
1
45°
23°
2
64°
28°
3
66°
44°
4
49°
28°
5
38°
29°
6
43°
27°
7
50°
30°
8
55°
32°
9
57°
35°
10
61°
38°
11
62°
39°
12
63°
44°
13
61°
43°
14
64°
42°
15
60°
41°
16
65°
42°
17
62°
44°
18
67°
48°
19
63°
48°
20
64°
44°
21
59°
38°
22
60°
39°
23
61°
40°
24
61°
39°
25
62°
40°
26
61°
41°
27
61°
41°
28
62°
42°
29
64°
50°
30
63°
48°
31
66°
50°
1
72°
52°
2
74°
53°
3
75°
53°
4
75°
55°
5
74°
55°
6
74°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Cohasset
Cohasset's May 2026 forecast shows daily high temperatures ranging from 38° to 75°, with overnight lows between 27° and 55°. The average high for May is 62° with an average low of 43°. 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 Cohasset. See also: June | July | August.
