S
M
T
W
T
F
S
26
58°
43°
27
76°
42°
28
67°
54°
29
55°
44°
30
50°
37°
1
46°
36°
2
46°
35°
3
60°
45°
4
70°
56°
5
70°
44°
6
50°
38°
7
48°
36°
8
49°
37°
9
53°
40°
10
55°
42°
11
58°
40°
12
57°
42°
13
60°
44°
14
62°
47°
15
60°
44°
16
61°
45°
17
72°
52°
18
70°
49°
19
65°
48°
20
72°
51°
21
69°
50°
22
65°
43°
23
61°
43°
24
63°
44°
25
63°
45°
26
64°
45°
27
64°
44°
28
65°
44°
29
66°
45°
30
65°
46°
31
70°
52°
1
66°
49°
2
68°
48°
3
69°
55°
4
71°
54°
5
70°
54°
6
76°
57°
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 48° to 76°, with overnight lows between 36° and 57°. The average high for May is 64° with an average low of 46°. 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.
