S
M
T
W
T
F
S
26
67°
52°
27
70°
50°
28
62°
50°
29
72°
55°
30
71°
50°
1
66°
43°
2
64°
41°
3
66°
35°
4
77°
38°
5
78°
46°
6
70°
60°
7
66°
46°
8
70°
40°
9
76°
45°
10
82°
49°
11
65°
52°
12
72°
45°
13
76°
43°
14
63°
43°
15
75°
37°
16
83°
50°
17
89°
58°
18
91°
61°
19
92°
60°
20
92°
59°
21
86°
60°
22
60°
55°
23
57°
53°
24
68°
55°
25
82°
64°
26
82°
67°
27
85°
69°
28
87°
64°
29
81°
56°
30
81°
61°
31
75°
55°
1
83°
58°
2
73°
54°
3
80°
47°
4
85°
51°
5
87°
56°
6
88°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Union
Union's May 2026 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. See also: June | July | August.
