S
M
T
W
T
F
S
29
48°
24°
30
61°
44°
31
66°
49°
1
72°
50°
2
50°
39°
3
57°
39°
4
67°
40°
5
55°
41°
6
53°
39°
7
56°
32°
8
45°
29°
9
47°
27°
10
53°
33°
11
62°
45°
12
53°
37°
13
65°
48°
14
78°
52°
15
81°
57°
16
82°
58°
17
80°
53°
18
60°
47°
19
51°
37°
20
53°
31°
21
49°
33°
22
50°
42°
23
71°
42°
24
60°
46°
25
50°
40°
26
55°
39°
27
67°
41°
28
65°
41°
29
60°
49°
30
57°
42°
1
60°
44°
2
60°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Stony Brook
Stony Brook's April 2026 forecast shows daily high temperatures ranging from 57° to 67°, with overnight lows between 41° and 49°. The average high for April is 62° with an average low of 43°. 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 Stony Brook. See also: May | June | July.