S
M
T
W
T
F
S
29
63°
41°
30
81°
50°
31
68°
39°
1
40°
36°
2
70°
38°
3
62°
39°
4
56°
41°
5
53°
37°
6
51°
32°
7
39°
28°
8
71°
35°
9
70°
44°
10
54°
38°
11
56°
35°
12
81°
56°
13
79°
62°
14
82°
57°
15
72°
60°
16
74°
49°
17
81°
49°
18
63°
40°
19
50°
36°
20
56°
33°
21
76°
50°
22
73°
51°
23
81°
52°
24
71°
48°
25
56°
43°
26
59°
42°
27
68°
47°
28
64°
50°
29
57°
39°
30
55°
41°
1
50°
38°
2
57°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Oak Brook
Oak Brook's April 2026 forecast shows daily high temperatures ranging from 50° to 57°, with overnight lows between 38° and 42°. The average high for April is 55° with an average low of 40°. 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 Oak Brook. See also: May | June | July.
