S
M
T
W
T
F
S
26
64°
45°
27
76°
44°
28
69°
52°
29
64°
53°
30
54°
38°
1
63°
35°
2
52°
34°
3
60°
34°
4
73°
49°
5
78°
61°
6
66°
50°
7
62°
42°
8
67°
36°
9
68°
51°
10
65°
48°
11
64°
44°
12
73°
40°
13
69°
48°
14
52°
44°
15
68°
39°
16
74°
45°
17
83°
58°
18
90°
60°
19
88°
67°
20
79°
56°
21
62°
52°
22
63°
55°
23
70°
52°
24
79°
64°
25
77°
59°
26
80°
63°
27
74°
61°
28
79°
53°
29
76°
52°
30
73°
50°
31
74°
53°
1
75°
55°
2
74°
54°
3
78°
58°
4
75°
60°
5
79°
59°
6
78°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in South Union Township
South Union Township's May 2026 forecast shows daily high temperatures ranging from 73° to 80°, with overnight lows between 50° and 64°. The average high for May is 77° with an average low of 57°. 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 South Union Township. See also: June | July | August.