S
M
T
W
T
F
S
29
50°
27°
30
69°
31°
31
69°
42°
1
42°
33°
2
42°
30°
3
72°
34°
4
49°
33°
5
46°
31°
6
41°
25°
7
31°
19°
8
50°
16°
9
64°
32°
10
46°
32°
11
50°
30°
12
62°
34°
13
69°
52°
14
72°
53°
15
72°
49°
16
66°
51°
17
65°
48°
18
66°
36°
19
43°
24°
20
37°
25°
21
53°
37°
22
61°
40°
23
67°
43°
24
67°
47°
25
54°
39°
26
57°
36°
27
54°
37°
28
49°
38°
29
49°
39°
30
50°
38°
1
54°
39°
2
52°
33°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Waterloo
Waterloo's April 2026 forecast shows daily high temperatures ranging from 37° to 67°, with overnight lows between 24° and 47°. The average high for April is 54° 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 Waterloo. See also: May | June | July.
