S
M
T
W
T
F
S
29
52°
25°
30
69°
38°
31
56°
39°
1
64°
39°
2
42°
35°
3
59°
37°
4
60°
38°
5
49°
39°
6
50°
32°
7
39°
28°
8
46°
24°
9
52°
27°
10
68°
34°
11
59°
40°
12
53°
30°
13
71°
42°
14
77°
53°
15
62°
47°
16
56°
45°
17
65°
46°
18
55°
42°
19
48°
35°
20
51°
31°
21
47°
27°
22
48°
33°
23
65°
35°
24
53°
33°
25
54°
32°
26
62°
37°
27
66°
36°
28
56°
41°
29
51°
44°
30
52°
45°
1
62°
42°
2
53°
44°
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 62°, with overnight lows between 42° and 45°. The average high for April is 56° 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 New Castle. See also: May | June | July.
