S
M
T
W
T
F
S
26
56°
41°
27
71°
36°
28
56°
42°
29
58°
48°
30
61°
43°
1
62°
36°
2
55°
41°
3
60°
42°
4
73°
35°
5
81°
50°
6
68°
53°
7
64°
49°
8
64°
39°
9
62°
47°
10
67°
46°
11
63°
45°
12
67°
37°
13
67°
51°
14
55°
47°
15
70°
47°
16
81°
44°
17
85°
62°
18
93°
59°
19
92°
65°
20
87°
63°
21
65°
53°
22
64°
48°
23
51°
48°
24
63°
56°
25
69°
59°
26
76°
61°
27
81°
58°
28
78°
53°
29
77°
50°
30
73°
53°
31
78°
57°
1
78°
59°
2
76°
57°
3
75°
58°
4
77°
55°
5
81°
60°
6
80°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Union Square
Union Square's May 2026 forecast shows daily high temperatures ranging from 51° to 81°, with overnight lows between 48° and 61°. The average high for May is 74° with an average low of 56°. 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 Square. See also: June | July | August.
