S
M
T
W
T
F
S
26
70°
53°
27
71°
54°
28
75°
56°
29
77°
58°
30
75°
58°
1
73°
57°
2
69°
56°
3
69°
52°
4
68°
49°
5
71°
58°
6
78°
59°
7
76°
60°
8
77°
59°
9
72°
57°
10
71°
53°
11
70°
59°
12
72°
60°
13
75°
60°
14
80°
62°
15
81°
62°
16
80°
61°
17
77°
62°
18
74°
59°
19
74°
55°
20
75°
59°
21
78°
62°
22
78°
57°
23
77°
57°
24
79°
58°
25
78°
57°
26
76°
57°
27
77°
62°
28
80°
64°
29
84°
64°
30
82°
58°
31
80°
58°
1
79°
59°
2
80°
62°
3
86°
66°
4
85°
67°
5
86°
67°
6
88°
66°
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 68° to 88°, with overnight lows between 49° and 67°. The average high for May is 77° with an average low of 59°. 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.
