S
M
T
W
T
F
S
29
73°
39°
30
88°
46°
31
70°
46°
1
46°
39°
2
64°
41°
3
57°
39°
4
45°
34°
5
59°
30°
6
50°
31°
7
40°
39°
8
68°
45°
9
55°
43°
10
64°
46°
11
68°
57°
12
72°
51°
13
75°
50°
14
63°
40°
15
53°
32°
16
62°
39°
17
67°
44°
18
66°
45°
19
63°
38°
20
67°
46°
21
66°
46°
22
68°
44°
23
57°
41°
24
63°
36°
25
61°
47°
26
67°
47°
27
69°
46°
28
70°
47°
29
67°
47°
30
63°
43°
1
66°
48°
2
66°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Diagonal
Diagonal's April 2026 forecast shows daily high temperatures ranging from 40° to 75°, with overnight lows between 31° and 57°. The average high for April is 64° 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 Diagonal. See also: May | June | July.
