S
M
T
W
T
F
S
26
61°
50°
27
62°
51°
28
60°
50°
29
62°
48°
30
60°
52°
1
62°
51°
2
62°
45°
3
61°
46°
4
66°
54°
5
68°
52°
6
62°
52°
7
63°
51°
8
67°
49°
9
64°
51°
10
64°
57°
11
73°
53°
12
64°
50°
13
66°
57°
14
74°
58°
15
67°
53°
16
67°
53°
17
68°
56°
18
73°
60°
19
76°
55°
20
75°
52°
21
66°
51°
22
68°
55°
23
68°
53°
24
72°
60°
25
77°
62°
26
78°
59°
27
69°
58°
28
70°
62°
29
70°
59°
30
71°
59°
31
71°
62°
1
79°
63°
2
78°
63°
3
79°
63°
4
78°
64°
5
80°
62°
6
79°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Union City
Union City's May 2026 forecast shows daily high temperatures ranging from 60° to 80°, with overnight lows between 45° and 64°. The average high for May is 69° with an average low of 55°. 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.
