S
M
T
W
T
F
S
26
66°
41°
27
73°
35°
28
72°
38°
29
69°
45°
30
59°
47°
1
64°
34°
2
58°
45°
3
55°
36°
4
73°
33°
5
83°
46°
6
68°
51°
7
62°
37°
8
59°
32°
9
52°
34°
10
71°
46°
11
63°
46°
12
64°
34°
13
63°
41°
14
58°
49°
15
63°
42°
16
80°
43°
17
90°
51°
18
91°
56°
19
97°
63°
20
89°
63°
21
68°
49°
22
65°
44°
23
61°
47°
24
55°
48°
25
78°
52°
26
84°
48°
27
87°
55°
28
74°
52°
29
73°
48°
30
59°
41°
31
74°
51°
1
66°
50°
2
64°
48°
3
68°
51°
4
83°
56°
5
84°
60°
6
81°
58°
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 84°, with overnight lows between 41° and 60°. The average high for May is 73° with an average low of 52°. 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.
