S
M
T
W
T
F
S
26
57°
36°
27
56°
36°
28
58°
37°
29
59°
36°
30
57°
36°
1
59°
39°
2
60°
38°
3
59°
37°
4
61°
43°
5
69°
45°
6
66°
39°
7
62°
41°
8
70°
48°
9
72°
49°
10
73°
44°
11
63°
40°
12
62°
40°
13
64°
44°
14
63°
45°
15
63°
48°
16
64°
49°
17
65°
49°
18
73°
43°
19
67°
45°
20
69°
45°
21
68°
44°
22
68°
44°
23
67°
45°
24
68°
44°
25
70°
45°
26
70°
47°
27
71°
47°
28
70°
46°
29
71°
51°
30
69°
49°
31
71°
48°
1
71°
55°
2
72°
50°
3
72°
49°
4
73°
56°
5
78°
52°
6
77°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Southwick
Southwick's May 2026 forecast shows daily high temperatures ranging from 56° to 78°, with overnight lows between 36° and 56°. The average high for May is 67° with an average low of 45°. 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 Southwick. See also: June | July | August.