S
M
T
W
T
F
S
27
59°
52°
28
66°
46°
29
75°
47°
30
66°
53°
1
68°
55°
2
61°
53°
3
58°
53°
4
67°
47°
5
85°
51°
6
73°
55°
7
66°
55°
8
75°
52°
9
83°
52°
10
72°
56°
11
64°
52°
12
64°
54°
13
68°
55°
14
67°
52°
15
73°
49°
16
69°
53°
17
63°
55°
18
69°
50°
19
72°
53°
20
70°
54°
21
73°
52°
22
66°
53°
23
62°
54°
24
61°
54°
25
65°
55°
26
66°
56°
27
75°
51°
28
59°
56°
29
72°
56°
30
87°
54°
31
79°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Union City
Union City's May 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for May is ° with an average low of °. 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 City. See also: June | July | August.