S
M
T
W
T
F
S
26
89°
79°
27
87°
79°
28
87°
78°
29
86°
78°
30
87°
78°
1
88°
78°
2
87°
77°
3
88°
77°
4
87°
80°
5
88°
79°
6
86°
79°
7
88°
80°
8
88°
79°
9
87°
79°
10
88°
79°
11
87°
79°
12
88°
79°
13
89°
79°
14
89°
71°
15
88°
78°
16
89°
79°
17
86°
77°
18
85°
75°
19
88°
79°
20
87°
80°
21
87°
78°
22
86°
78°
23
87°
77°
24
86°
76°
25
84°
76°
26
87°
78°
27
85°
77°
28
85°
77°
29
87°
78°
30
87°
79°
31
86°
80°
1
87°
79°
2
87°
79°
3
87°
78°
4
87°
79°
5
87°
79°
6
88°
79°
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.
