S
M
T
W
T
F
S
26
61°
43°
27
71°
43°
28
72°
54°
29
55°
47°
30
52°
40°
1
44°
36°
2
45°
37°
3
59°
32°
4
71°
48°
5
69°
48°
6
56°
44°
7
57°
39°
8
57°
43°
9
68°
50°
10
61°
45°
11
62°
38°
12
65°
38°
13
67°
43°
14
59°
42°
15
68°
36°
16
69°
49°
17
82°
57°
18
86°
63°
19
86°
65°
20
66°
48°
21
66°
48°
22
60°
47°
23
68°
58°
24
73°
59°
25
76°
58°
26
78°
62°
27
75°
60°
28
75°
51°
29
71°
48°
30
69°
47°
31
65°
49°
1
68°
53°
2
69°
54°
3
69°
53°
4
70°
53°
5
73°
54°
6
70°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Mount Union
Mount Union's May 2026 forecast shows daily high temperatures ranging from 65° to 78°, with overnight lows between 47° and 62°. The average high for May is 71° with an average low of 54°. 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 Mount Union. See also: June | July | August.