S
M
T
W
T
F
S
26
60°
41°
27
59°
40°
28
60°
40°
29
60°
39°
30
61°
37°
1
61°
46°
2
71°
45°
3
66°
42°
4
59°
40°
5
62°
38°
6
63°
40°
7
62°
42°
8
62°
43°
9
64°
41°
10
63°
40°
11
65°
41°
12
65°
44°
13
66°
41°
14
65°
43°
15
66°
42°
16
65°
42°
17
67°
51°
18
74°
51°
19
71°
49°
20
68°
46°
21
68°
49°
22
71°
45°
23
70°
46°
24
70°
45°
25
71°
49°
26
77°
52°
27
76°
51°
28
79°
53°
29
79°
54°
30
78°
54°
31
72°
53°
1
72°
54°
2
73°
55°
3
72°
49°
4
80°
51°
5
80°
56°
6
81°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Southampton
Southampton's May 2026 forecast shows daily high temperatures ranging from 59° to 81°, with overnight lows between 37° and 57°. The average high for May is 68° with an average low of 46°. 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 Southampton. See also: June | July | August.
