S
M
T
W
T
F
S
29
55°
43°
30
54°
45°
31
55°
52°
1
55°
41°
2
50°
36°
3
52°
41°
4
52°
37°
5
48°
37°
6
54°
36°
7
59°
46°
8
59°
50°
9
54°
39°
10
N/A
11
51°
44°
12
53°
37°
13
52°
37°
14
53°
50°
15
57°
45°
16
56°
44°
17
56°
48°
18
55°
45°
19
57°
45°
20
55°
43°
21
56°
45°
22
55°
43°
23
52°
39°
24
52°
42°
25
53°
41°
26
53°
39°
27
54°
40°
28
53°
42°
29
54°
45°
30
56°
45°
1
56°
44°
2
55°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
April Weather in Castlereagh
Castlereagh's April 2026 forecast shows daily high temperatures ranging from 51° to 57°, with overnight lows between 37° and 50°. The average high for April is 54° with an average low of 43°. 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 Castlereagh. See also: May | June | July.
