S
M
T
W
T
F
S
29
47°
29°
30
58°
37°
31
47°
34°
1
38°
32°
2
43°
31°
3
71°
40°
4
45°
40°
5
51°
31°
6
40°
24°
7
31°
21°
8
40°
33°
9
58°
42°
10
52°
42°
11
58°
38°
12
59°
45°
13
60°
40°
14
55°
41°
15
53°
37°
16
56°
40°
17
54°
32°
18
57°
36°
19
56°
40°
20
60°
39°
21
59°
39°
22
51°
40°
23
60°
42°
24
61°
37°
25
54°
34°
26
52°
31°
27
52°
31°
28
56°
32°
29
52°
34°
30
52°
34°
1
53°
35°
2
54°
33°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Algonquin
Algonquin's April 2026 forecast shows daily high temperatures ranging from 31° to 61°, with overnight lows between 21° and 45°. The average high for April is 53° with an average low of 36°. 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 Algonquin. See also: May | June | July.