S
M
T
W
T
F
S
29
58°
25°
30
67°
37°
31
80°
53°
1
76°
53°
2
53°
41°
3
64°
41°
4
82°
46°
5
54°
45°
6
53°
40°
7
49°
26°
8
52°
30°
9
58°
36°
10
71°
51°
11
67°
38°
12
70°
49°
13
78°
56°
14
86°
55°
15
78°
44°
16
59°
39°
17
61°
42°
18
66°
43°
19
68°
39°
20
68°
46°
21
69°
46°
22
70°
47°
23
71°
47°
24
72°
45°
25
70°
41°
26
61°
43°
27
60°
39°
28
62°
40°
29
62°
37°
30
60°
37°
1
63°
40°
2
64°
38°
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 49° to 86°, with overnight lows between 26° and 56°. The average high for April is 65° with an average low of 42°. 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.