S
M
T
W
T
F
S
26
59°
43°
27
69°
42°
28
64°
44°
29
61°
49°
30
62°
48°
1
65°
44°
2
63°
50°
3
61°
46°
4
74°
47°
5
85°
58°
6
72°
56°
7
66°
50°
8
65°
46°
9
69°
52°
10
77°
50°
11
62°
51°
12
68°
44°
13
76°
51°
14
68°
52°
15
68°
51°
16
83°
51°
17
90°
65°
18
92°
68°
19
97°
73°
20
94°
66°
21
65°
56°
22
67°
57°
23
55°
52°
24
60°
56°
25
71°
63°
26
75°
62°
27
79°
65°
28
83°
57°
29
80°
55°
30
70°
52°
31
71°
56°
1
76°
60°
2
76°
59°
3
78°
59°
4
76°
60°
5
78°
57°
6
73°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Union Beach
Union Beach's May 2026 forecast shows daily high temperatures ranging from 55° to 83°, with overnight lows between 52° and 65°. The average high for May is 73° with an average low of 58°. 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 Union Beach. See also: June | July | August.