S
M
T
W
T
F
S
29
72°
40°
30
85°
54°
31
84°
65°
1
68°
65°
2
75°
64°
3
80°
60°
4
65°
37°
5
58°
39°
6
61°
40°
7
54°
39°
8
64°
45°
9
71°
51°
10
70°
55°
11
66°
49°
12
67°
50°
13
69°
51°
14
65°
44°
15
71°
51°
16
73°
48°
17
62°
49°
18
67°
50°
19
72°
51°
20
73°
53°
21
73°
54°
22
74°
54°
23
74°
53°
24
75°
55°
25
74°
53°
26
68°
43°
27
62°
43°
28
63°
47°
29
65°
47°
30
64°
44°
1
65°
50°
2
66°
53°
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 54° to 80°, with overnight lows between 37° and 65°. The average high for April is 68° with an average low of 50°. 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.
