S
M
T
W
T
F
S
29
54°
41°
30
52°
43°
31
54°
48°
1
54°
34°
2
48°
28°
3
50°
37°
4
52°
36°
5
45°
32°
6
52°
36°
7
61°
46°
8
57°
48°
9
50°
37°
10
46°
32°
11
51°
41°
12
51°
34°
13
50°
33°
14
53°
50°
15
56°
45°
16
57°
48°
17
56°
44°
18
53°
38°
19
54°
39°
20
55°
42°
21
57°
41°
22
55°
40°
23
54°
39°
24
51°
40°
25
56°
41°
26
55°
40°
27
55°
43°
28
56°
41°
29
56°
42°
30
54°
42°
1
54°
41°
2
53°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Greencastle
Greencastle's April 2026 forecast shows daily high temperatures ranging from 50° to 57°, with overnight lows between 33° and 50°. The average high for April is 54° with an average low of 41°. 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 Greencastle. See also: May | June | July.