S
M
T
W
T
F
S
26
60°
40°
27
62°
38°
28
69°
43°
29
60°
46°
30
52°
37°
1
58°
36°
2
49°
34°
3
52°
29°
4
65°
40°
5
71°
55°
6
61°
52°
7
56°
42°
8
61°
37°
9
64°
47°
10
71°
50°
11
57°
42°
12
73°
45°
13
67°
41°
14
55°
37°
15
69°
47°
16
82°
56°
17
78°
54°
18
82°
55°
19
81°
54°
20
72°
51°
21
70°
53°
22
72°
52°
23
74°
53°
24
71°
54°
25
72°
46°
26
73°
49°
27
73°
51°
28
72°
51°
29
74°
50°
30
74°
52°
31
73°
51°
1
73°
50°
2
70°
47°
3
72°
52°
4
73°
53°
5
70°
53°
6
72°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in West Union
West Union's May 2026 forecast shows daily high temperatures ranging from 55° to 82°, with overnight lows between 37° and 56°. The average high for May is 73° with an average low of 50°. 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 West Union. See also: June | July | August.