S
M
T
W
T
F
S
26
61°
53°
27
62°
52°
28
63°
52°
29
65°
52°
30
63°
52°
1
62°
54°
2
61°
54°
3
63°
54°
4
64°
55°
5
65°
56°
6
66°
55°
7
65°
54°
8
64°
56°
9
67°
55°
10
68°
56°
11
67°
52°
12
70°
53°
13
70°
54°
14
64°
50°
15
60°
52°
16
61°
51°
17
61°
49°
18
60°
52°
19
60°
49°
20
63°
51°
21
65°
53°
22
67°
54°
23
68°
56°
24
69°
56°
25
69°
55°
26
66°
54°
27
63°
53°
28
62°
52°
29
61°
51°
30
60°
52°
31
61°
51°
1
61°
50°
2
62°
51°
3
64°
53°
4
67°
55°
5
65°
52°
6
63°
53°
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 60° to 70°, with overnight lows between 49° and 56°. The average high for May is 64° with an average low of 53°. 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.
