S
M
T
W
T
F
S
29
83°
57°
30
73°
60°
31
66°
57°
1
60°
55°
2
60°
48°
3
72°
49°
4
80°
53°
5
80°
58°
6
59°
50°
7
61°
52°
8
66°
53°
9
64°
53°
10
66°
56°
11
60°
54°
12
58°
51°
13
61°
50°
14
59°
51°
15
61°
49°
16
65°
50°
17
68°
57°
18
74°
50°
19
68°
53°
20
64°
54°
21
61°
52°
22
63°
52°
23
67°
51°
24
60°
52°
25
58°
54°
26
62°
52°
27
63°
53°
28
67°
54°
29
67°
55°
30
64°
53°
1
63°
52°
2
60°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Union Square
Union Square's April 2026 forecast shows daily high temperatures ranging from 60° to 67°, with overnight lows between 52° and 55°. The average high for April 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 April weather will actually feel in Union Square. See also: May | June | July.