S
M
T
W
T
F
S
29
60°
29°
30
68°
47°
31
77°
57°
1
59°
43°
2
80°
42°
3
78°
61°
4
83°
54°
5
60°
40°
6
49°
32°
7
38°
25°
8
61°
20°
9
75°
43°
10
74°
43°
11
56°
37°
12
78°
37°
13
80°
63°
14
78°
62°
15
82°
59°
16
81°
58°
17
76°
53°
18
82°
48°
19
50°
37°
20
45°
29°
21
69°
24°
22
76°
52°
23
79°
47°
24
81°
50°
25
64°
42°
26
63°
43°
27
75°
38°
28
73°
53°
29
62°
36°
30
55°
39°
1
52°
35°
2
52°
34°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in New Castle
New Castle's April 2026 forecast shows daily high temperatures ranging from 52° to 73°, with overnight lows between 34° and 53°. The average high for April is 59° with an average low of 39°. 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 New Castle. See also: May | June | July.
