S
M
T
W
T
F
S
26
70°
51°
27
70°
51°
28
71°
50°
29
70°
49°
30
68°
53°
1
70°
47°
2
70°
48°
3
69°
47°
4
69°
44°
5
70°
45°
6
70°
45°
7
71°
52°
8
77°
54°
9
79°
55°
10
81°
54°
11
75°
51°
12
74°
47°
13
70°
46°
14
72°
48°
15
77°
55°
16
76°
50°
17
78°
57°
18
82°
57°
19
79°
56°
20
76°
58°
21
75°
58°
22
76°
59°
23
82°
60°
24
83°
60°
25
83°
59°
26
84°
60°
27
84°
61°
28
85°
60°
29
86°
61°
30
87°
61°
31
85°
59°
1
86°
57°
2
85°
56°
3
80°
61°
4
80°
59°
5
81°
62°
6
81°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Union Mills
Union Mills's May 2026 forecast shows daily high temperatures ranging from 68° to 87°, with overnight lows between 44° and 62°. The average high for May is 77° 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 Union Mills. See also: June | July | August.