S
M
T
W
T
F
S
29
47°
13°
30
55°
42°
31
60°
47°
1
63°
47°
2
47°
39°
3
56°
39°
4
68°
40°
5
52°
41°
6
52°
27°
7
57°
26°
8
43°
21°
9
46°
19°
10
50°
23°
11
61°
45°
12
52°
28°
13
58°
45°
14
76°
44°
15
79°
48°
16
79°
51°
17
78°
44°
18
57°
38°
19
50°
26°
20
51°
20°
21
47°
38°
22
50°
39°
23
66°
41°
24
59°
39°
25
51°
41°
26
56°
45°
27
60°
45°
28
59°
48°
29
58°
49°
30
60°
49°
1
61°
48°
2
60°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Riverhead
Riverhead's April 2026 forecast shows daily high temperatures ranging from 47° to 66°, with overnight lows between 38° and 49°. The average high for April is 57° with an average low of 44°. 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 Riverhead. See also: May | June | July.
