S
M
T
W
T
F
S
26
59°
42°
27
63°
35°
28
56°
39°
29
54°
44°
30
53°
44°
1
64°
45°
2
59°
46°
3
53°
42°
4
71°
43°
5
77°
50°
6
69°
54°
7
64°
46°
8
61°
42°
9
58°
36°
10
71°
50°
11
63°
46°
12
63°
43°
13
63°
53°
14
61°
50°
15
56°
49°
16
75°
61°
17
83°
57°
18
68°
58°
19
87°
66°
20
78°
52°
21
67°
51°
22
68°
54°
23
70°
53°
24
69°
52°
25
70°
53°
26
72°
51°
27
68°
52°
28
67°
50°
29
67°
51°
30
68°
56°
31
69°
56°
1
70°
55°
2
70°
54°
3
69°
52°
4
69°
51°
5
70°
56°
6
71°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Jamaica Plain
Jamaica Plain's May 2026 forecast shows daily high temperatures ranging from 56° to 87°, with overnight lows between 49° and 66°. The average high for May is 70° 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 Jamaica Plain. See also: June | July | August.