S
M
T
W
T
F
S
26
60°
43°
27
71°
43°
28
65°
51°
29
65°
46°
30
60°
36°
1
57°
35°
2
55°
34°
3
60°
37°
4
61°
41°
5
66°
47°
6
68°
47°
7
65°
46°
8
62°
40°
9
63°
42°
10
64°
40°
11
64°
43°
12
68°
50°
13
65°
49°
14
65°
48°
15
66°
45°
16
65°
43°
17
65°
43°
18
66°
46°
19
64°
45°
20
64°
45°
21
66°
44°
22
67°
47°
23
70°
49°
24
73°
54°
25
71°
48°
26
69°
46°
27
69°
47°
28
70°
55°
29
70°
55°
30
71°
56°
31
73°
56°
1
72°
55°
2
72°
56°
3
73°
56°
4
75°
57°
5
81°
49°
6
75°
50°
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 55° to 81°, with overnight lows between 34° and 57°. The average high for May is 67° with an average low of 47°. 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.