S
M
T
W
T
F
S
29
82°
54°
30
79°
50°
31
71°
49°
1
64°
47°
2
64°
50°
3
76°
43°
4
80°
49°
5
83°
46°
6
78°
52°
7
81°
49°
8
79°
53°
9
77°
49°
10
72°
43°
11
60°
43°
12
64°
40°
13
64°
37°
14
74°
41°
15
77°
44°
16
76°
49°
17
75°
46°
18
74°
49°
19
75°
47°
20
74°
42°
21
68°
38°
22
72°
44°
23
73°
42°
24
72°
46°
25
70°
44°
26
71°
45°
27
75°
47°
28
79°
49°
29
79°
49°
30
80°
50°
1
81°
49°
2
80°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Onyx
Onyx's April 2026 forecast shows daily high temperatures ranging from 60° to 81°, with overnight lows between 37° and 53°. The average high for April is 74° with an average low of 46°. 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 Onyx. See also: May | June | July.