S
M
T
W
T
F
S
29
67°
36°
30
77°
54°
31
80°
64°
1
72°
43°
2
78°
43°
3
79°
67°
4
73°
45°
5
53°
39°
6
59°
39°
7
49°
33°
8
69°
35°
9
76°
55°
10
70°
49°
11
66°
40°
12
80°
52°
13
81°
65°
14
83°
69°
15
80°
65°
16
77°
62°
17
82°
57°
18
74°
43°
19
59°
35°
20
58°
34°
21
77°
43°
22
79°
60°
23
82°
58°
24
79°
55°
25
73°
54°
26
69°
50°
27
69°
54°
28
67°
57°
29
64°
40°
30
61°
47°
1
57°
37°
2
56°
39°
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 56° to 64°, with overnight lows between 37° and 47°. The average high for April is 60° with an average low of 41°. 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.
