S
M
T
W
T
F
S
29
79°
40°
30
83°
65°
31
87°
66°
1
86°
66°
2
82°
68°
3
88°
68°
4
79°
57°
5
64°
49°
6
71°
45°
7
76°
47°
8
80°
54°
9
79°
54°
10
82°
54°
11
86°
56°
12
85°
61°
13
83°
69°
14
86°
68°
15
86°
68°
16
86°
66°
17
88°
66°
18
74°
52°
19
71°
46°
20
78°
45°
21
81°
49°
22
84°
61°
23
85°
63°
24
79°
64°
25
81°
62°
26
81°
67°
27
85°
61°
28
80°
59°
29
83°
64°
30
81°
56°
1
72°
52°
2
73°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Walnut
Walnut's April 2026 forecast shows daily high temperatures ranging from 72° to 85°, with overnight lows between 51° and 67°. The average high for April is 80° with an average low of 60°. 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 Walnut. See also: May | June | July.