S
M
T
W
T
F
S
26
55°
43°
27
58°
44°
28
52°
43°
29
50°
45°
30
56°
46°
1
65°
47°
2
55°
48°
3
55°
44°
4
73°
46°
5
79°
50°
6
70°
57°
7
65°
50°
8
62°
47°
9
55°
42°
10
75°
51°
11
62°
49°
12
64°
48°
13
64°
46°
14
63°
51°
15
55°
50°
16
80°
49°
17
90°
59°
18
71°
59°
19
96°
68°
20
91°
65°
21
73°
57°
22
59°
50°
23
63°
50°
24
55°
51°
25
68°
54°
26
80°
62°
27
80°
60°
28
68°
52°
29
63°
51°
30
68°
46°
31
64°
54°
1
70°
55°
2
69°
56°
3
73°
59°
4
71°
58°
5
76°
56°
6
69°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in South End
South End's May 2026 forecast shows daily high temperatures ranging from 55° to 80°, with overnight lows between 46° and 62°. The average high for May is 69° with an average low of 55°. 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 South End. See also: June | July | August.