S
M
T
W
T
F
S
29
69°
34°
30
73°
34°
31
54°
33°
1
43°
29°
2
38°
32°
3
41°
32°
4
40°
32°
5
52°
29°
6
42°
22°
7
45°
14°
8
62°
37°
9
51°
36°
10
55°
31°
11
52°
26°
12
77°
46°
13
72°
47°
14
66°
49°
15
68°
43°
16
78°
38°
17
79°
38°
18
45°
32°
19
47°
28°
20
59°
22°
21
75°
37°
22
80°
40°
23
78°
58°
24
63°
44°
25
57°
38°
26
68°
50°
27
59°
41°
28
60°
38°
29
54°
33°
30
49°
32°
1
52°
29°
2
62°
36°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Island Lake
Island Lake's April 2026 forecast shows daily high temperatures ranging from 49° to 68°, with overnight lows between 29° and 50°. The average high for April is 58° with an average low of 37°. 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 Island Lake. See also: May | June | July.
